<Page>


                                                                     EXHIBIT 1.1


                                                                  EXECUTION COPY

                                  $170,000,000


                    6-5/8% Senior Subordinated Notes Due 2016

                           Iron Mountain Incorporated


                             UNDERWRITING AGREEMENT


                                December 4, 2003



BEAR, STEARNS & CO. INC.
   as Representative of the
   several Underwriters named
   in Schedule I attached hereto
c/o Bear, Stearns & Co. Inc.
383 Madison Avenue
New York, New York  10179

Ladies/Gentlemen:

     Iron Mountain Incorporated, a corporation organized and existing under the
laws of Pennsylvania (the "COMPANY"), proposes, subject to the terms and
conditions stated herein, to issue and sell to the several underwriters named in
Schedule I hereto (the "UNDERWRITERS"), for whom Bear, Stearns & Co. Inc. is
acting as representative (the "REPRESENTATIVE"), an aggregate of $170,000,000
principal amount of the Company's 6-5/8% Senior Subordinated Notes due 2016 (the
"Notes"). The Notes will be irrevocably and unconditionally guaranteed (the
"GUARANTEES") by the subsidiaries of the Company listed in Schedule II hereto
that have signed this Agreement (each, a "Guarantor" and, collectively, the
"GUARANTORS"), and will be issued pursuant to an Indenture dated as of December
30, 2002 (the "BASE INDENTURE"), as supplemented by a Second Supplemental
Indenture thereto, dated as of June 20, 2003 (the "SECOND SUPPLEMENTAL
INDENTURE") among the Company, the Guarantors and The Bank of New York, as
trustee (in such capacity, the "TRUSTEE"), pursuant to which the Company
previously issued $150,000,000 in aggregate principal amount of the Company's
6-5/8% Senior Subordinated Notes due 2016 (the "EXISTING NOTES"). The Base
Indenture, as supplemented by the Second Supplemental Indenture, is hereafter
called the "Indenture". If you are the only Underwriter, all references herein
to the Representative shall be deemed to be to the Underwriter.

     The Company and the Underwriters, in accordance with the requirements of
Rule 2710(c)(8) and Rule 2720 ("RULE 2720") of the National Association of
Securities Dealers, Inc. (the "NASD") and subject to the terms and conditions
stated herein, also hereby confirm the engagement of the services of Bear,
Stearns & Co. Inc.


<Page>


(the "INDEPENDENT UNDERWRITER") as a "qualified independent underwriter" within
the meaning of Section (b)(15) of Rule 2720 in connection with the offering and
sale of the Notes.

1.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND THE GUARANTORS. The
     Company and each of the Guarantors jointly and severally represents and
     warrants to, and agrees with, each of the Underwriters and the Independent
     Underwriter that:

          (a) The Company has filed with the Securities and Exchange Commission
     (the "COMMISSION") a registration statement on Form S-3 (No. 333-105494)
     filed on May 23, 2003, as amended by Amendment No. 1 thereto, filed on June
     5, 2003, for the registration of the Company's debt and other securities,
     as described therein, including the Notes, under the Securities Act of
     1933, as amended (the "SECURITIES ACT"), and the offering thereof from time
     to time in accordance with Rule 415 of the rules and regulations of the
     Commission (the "RULES AND REGULATIONS") under the Securities Act. Such
     registration statement, as so amended, has been declared effective by the
     Commission and copies have heretofore been delivered to the Underwriters
     and the Independent Underwriter. Such registration statement, as so
     amended, including all information, if any, deemed to be a part thereof
     pursuant to Rule 430A of the Rules and Regulations, is referred to herein
     as the "REGISTRATION STATEMENT." No stop order suspending the effectiveness
     of the Registration Statement has been issued and no proceeding for that
     purpose has been initiated or, to the Company's knowledge, threatened by
     the Commission. The Company has filed with the Commission a final
     prospectus supplement pursuant to Rule 424(b) of the Rules and Regulations
     relating to the offering and sale of a portion of the Existing Notes. The
     Company will file the Prospectus (as defined below) with the Commission
     pursuant to Rule 424(b) of the Rules and Regulations. The base prospectus
     contained in the Registration Statement, at the time such registration
     statement was declared effective, as supplemented by the final prospectus
     supplement relating to the offering and sale of the Notes (the "OFFERING"),
     in the form in which it is to be filed with the Commission pursuant to Rule
     424(b) of the Rules and Regulations, is hereinafter referred to as the
     "PROSPECTUS," except that if any revised prospectus or prospectus
     supplement shall be provided to the Underwriters and the Independent
     Underwriter by the Company for use in connection with the Offering which
     differs from the Prospectus (whether or not such revised prospectus or
     prospectus supplement is required to be filed by the Company pursuant to
     Rule 424(b) of the Rules and Regulations), the term "Prospectus" shall
     refer to such revised prospectus or prospectus supplement, as the case may
     be, from and after the time it is first provided to the Underwriters and
     the Independent Underwriter for such use. Any preliminary prospectus
     supplement (and the related base prospectus) relating to the Offering filed
     with the Commission pursuant to Rule 424 of the Rules and Regulations is
     hereafter called the "Preliminary Prospectus." Any reference herein to the
     Registration Statement or the Prospectus shall be deemed to refer to and
     include the documents incorporated by reference therein pursuant to Item 12
     of Form S-3, which were filed under the Securities Exchange Act of 1934, as
     amended (the "EXCHANGE ACT"), on or before the effective date of the
     Registration Statement or the date of the Prospectus, as the case may be,
     and any reference herein to the terms "amend", "amendment" or "supplement"
     with respect to the



                                       2

<Page>


     Registration Statement or the Prospectus shall be deemed to refer to and
     include (i) the filing of any document under the Exchange Act after the
     effective date of the Registration Statement or the date of the Prospectus,
     as the case may be, which is incorporated therein by reference and (ii) any
     such document so filed. All references in this Agreement to the
     Registration Statement and the Prospectus, or any amendments or supplements
     to any of the foregoing, shall be deemed to include any copy thereof filed
     with the Commission pursuant to its Electronic Data Gathering, Analysis and
     Retrieval System ("EDGAR").

          (b) At the time of the effectiveness of the Registration Statement or
     the effectiveness of any post-effective amendment to the Registration
     Statement, when the Prospectus is first filed with the Commission pursuant
     to Rule 424(b) or Rule 434 of the Rules and Regulations, when any
     supplement to or amendment of the Prospectus is filed with the Commission,
     when any document filed under the Exchange Act is filed and at the Closing
     Date (as hereinafter defined), the Registration Statement and the
     Prospectus and any amendments thereof and supplements thereto complied or
     will comply in all material respects with the applicable provisions of the
     Securities Act and the Rules and Regulations thereunder and the Exchange
     Act and the Rules and Regulations thereunder and did not and will not
     contain an untrue statement of a material fact and did not and will not
     omit to state any material fact required to be stated therein or necessary
     in order to make the statements therein (i) in the case of the Registration
     Statement, not misleading and (ii) in the case of the Prospectus, or the
     Preliminary Prospectus, if any, in light of the circumstances under which
     they were made, not misleading. When a related Preliminary Prospectus, if
     any, was first filed with the Commission (whether filed as part of the
     Registration Statement or any amendment thereto or pursuant to Rule 424(a)
     of the Rules and Regulations) and when any amendment thereof or supplement
     thereto was first filed with the Commission, such Preliminary Prospectus,
     if any, and any amendments thereof and supplements thereto complied in all
     material respects with the applicable provisions of the Securities Act, the
     Exchange Act and the respective Rules and Regulations thereunder and did
     not contain an untrue statement of a material fact and did not omit to
     state any material fact required to be stated therein or necessary in order
     to make the statements therein, in light of the circumstances under which
     they were made, not misleading. No representation and warranty is made in
     this subsection (b), however, with respect to any information contained in
     or omitted from the Registration Statement or the Prospectus or related
     Preliminary Prospectus, if any, or any amendment thereof or supplement
     thereto in reliance upon and in conformity with information furnished in
     writing to the Company by or on behalf of any Underwriter or the
     Independent Underwriter through you specifically for use therein
     ("UNDERWRITERS' INFORMATION"). The parties acknowledge and agree that the
     Underwriters' Information consists solely of the material included in the
     fourth and sixth paragraphs under the caption "Underwriting" in the
     prospectus supplement portion of the Prospectus.

          (c) Subsequent to the respective dates as of which information is
     given in the Registration Statement and the Prospectus, except as set forth
     in or incorporated by reference into the Registration Statement and the
     Prospectus, there has been no material adverse change or any development
     involving a prospective material adverse change in the business, prospects,
     properties, operations, condition (financial

                                       3

<Page>

     or other) or results of operations of the Company and its subsidiaries,
     taken as a whole, whether or not arising from transactions in the ordinary
     course of business, and since the date of the latest balance sheet
     presented in or incorporated by reference into the Registration Statement
     and the Prospectus, neither the Company nor any of its subsidiaries has
     incurred or undertaken any liabilities or obligations, direct or
     contingent, which are material to the Company and its subsidiaries taken as
     a whole, except for liabilities or obligations which are reflected in or
     incorporated by reference into the Registration Statement and the
     Prospectus.

          (d) The conditions for use of Form S-3, as set forth in the General
     Instructions thereto, have been satisfied.

          (e) The documents incorporated or deemed to be incorporated by
     reference in the Prospectus, at the time they were or hereafter are filed
     with the Commission, complied and will comply in all material respects with
     the requirements of the Exchange Act and the Rules and Regulations
     thereunder, and, when read together with the other information in the
     Prospectus, at the time the Registration Statement and any amendments
     thereto become effective and at the Closing Date (as hereinafter defined),
     will not contain any untrue statement of a material fact or omit to state a
     material fact required to be stated therein or necessary to make the
     statements therein, in the light of the circumstances under which they were
     made, not misleading.

          (f) The Company and each of its subsidiaries has been duly
     incorporated or formed, is validly existing as a corporation, limited
     liability company or Massachusetts statutory business trust in good
     standing under the laws of its jurisdiction of incorporation or formation
     and has the corporate power and authority to carry on its business as it is
     currently being conducted and to own, lease and operate its properties, and
     each is duly qualified and is in good standing as a foreign corporation,
     limited liability company or statutory business trust authorized to do
     business in each jurisdiction in which the nature of its business or its
     ownership or leasing of property requires such qualification, except where
     the failure to be so qualified would not have a material adverse effect
     (financial or otherwise) on the Company and its subsidiaries, taken as a
     whole (a "MATERIAL ADVERSE EFFECT").

          (g) All of the outstanding shares of capital stock of, or other
     ownership interests in, each of the Company's subsidiaries have been duly
     authorized and validly issued and are fully paid and non-assessable; all of
     such capital stock or other ownership interests (in the case of the
     Company's wholly-owned subsidiaries) or all of such capital stock or other
     ownership interests that the Company owns (in the case of less than
     wholly-owned


                                       4
<Page>


     subsidiaries as disclosed in the Prospectus or Schedule III hereto) are
     owned directly or indirectly by the Company, in each case, free and clear
     of any security interest, claim, lien, encumbrance or adverse claim of any
     nature, except as disclosed in the Prospectus or such as are not material
     to the business prospects, financial condition or results of operations of
     the Company and its subsidiaries, taken as a whole; and Schedule III hereto
     sets forth the Company's ownership interest in any subsidiary (as defined
     in Regulation S-X Rule 1-02(x) of the Rules and Regulations) that is less
     than wholly-owned.

          (h) This Agreement has been duly authorized, executed and delivered by
     the Company and the Guarantors and is a valid and binding agreement of the
     Company and the Guarantors enforceable in accordance with its terms except
     as (i) rights to indemnity and contribution hereunder may be limited by
     applicable law, (ii) the enforceability hereof may be limited by
     bankruptcy, insolvency, fraudulent conveyance or similar laws affecting
     creditors' rights generally and (iii) rights of acceleration and the
     availability of equitable remedies may be limited by equitable principles
     of general applicability.

          (i) The Notes have been duly and validly authorized by the Company for
     issuance and sale pursuant to this Agreement, each Guarantee has been duly
     and validly authorized by the Guarantor to which it relates and, when
     executed and authenticated in accordance with the provisions of the
     Indenture and delivered to the Underwriters and the Independent Underwriter
     against payment therefor as provided by this Agreement, the Notes and the
     Guarantees will be entitled to the benefits of the Indenture, and will be
     valid and binding obligations of the Company and the Guarantors,
     respectively, enforceable in accordance with their terms except as (i) the
     enforceability thereof may be limited by bankruptcy, insolvency, fraudulent
     conveyance or similar laws affecting creditors' rights generally and (ii)
     rights of acceleration and the availability of equitable remedies may be
     limited by equitable principles of general applicability.

          (j) The Indenture has been duly and validly authorized, executed and
     delivered by the Company and each of the Guarantors and has been duly and
     validly qualified under the Trust Indenture Act of 1939, as amended, and
     assuming the due authorization, execution and delivery thereof by the
     Trustee, the Indenture is a valid and binding agreement of the Company and
     the Guarantors, enforceable in accordance with its terms except as (i) the
     enforceability thereof may be limited by bankruptcy, insolvency, fraudulent
     conveyance or similar laws affecting creditors' rights generally and (ii)
     rights of acceleration and the availability of equitable remedies may be
     limited by equitable principles of general applicability. The Indenture
     conforms and any amendment or supplement thereto will conform with the
     requirements of the Trust Indenture Act of 1939, as amended.

          (k) The Notes and Guarantees conform as to legal matters to the
     description thereof contained in the Prospectus.

          (l) Neither the Company nor any of its subsidiaries is in violation of
     its respective charter or by-laws or comparable organizational documents or
     in default (and no condition exists which, with notice or lapse of time or
     both, would constitute a default) in the performance of any obligation,
     agreement or condition contained in any bond, debenture, note or any other
     evidence of indebtedness or in any other agreement, indenture or instrument
     material to the conduct of the business of the Company and its
     subsidiaries, taken as a whole, to which the Company or any of its
     subsidiaries is a party or by which it or any of its subsidiaries or their
     respective property is bound except for such defaults as could not,
     individually or in the aggregate, have a Material Adverse Effect.


                                       5
<Page>


          (m) The execution, delivery and performance of this Agreement, the
     Indenture, the Notes and the Guarantees and compliance by the Company and
     the Guarantors with all the provisions hereof and thereof, as the case may
     be, and the consummation of the transactions contemplated hereby and
     thereby will not require any consent, approval, authorization or other
     order of any court, regulatory body, administrative agency or other
     governmental body (except as such may be required under the securities or
     Blue Sky laws of the various states or jurisdictions outside the United
     States), and will not conflict with or constitute a breach of any of the
     terms or provisions of, or a default under, the charter or by-laws or
     comparable organizational documents of the Company or any of its
     subsidiaries or any agreement, indenture or other instrument to which it or
     any of its subsidiaries is a party or by which it or any of its
     subsidiaries or their respective property is bound, or violate or conflict
     with any laws, administrative regulations or rulings or court decrees
     applicable to the Company, any of its subsidiaries or their respective
     property.

          (n) Except as otherwise set forth in the Prospectus, there are no
     material legal or governmental proceedings pending to which the Company or
     any of its subsidiaries is a party or to which any of their respective
     property is the subject, and, to the best of the Company's knowledge, no
     such proceedings are threatened or contemplated.

          (o) Neither the Company nor any of its subsidiaries is currently in
     violation of any foreign, federal, state or local law or regulation
     relating to the protection of human health or safety, the environment or
     hazardous or toxic substances or wastes, pollutants or contaminants
     ("ENVIRONMENTAL LAWS"), nor any federal or state law relating to
     discrimination in the hiring, promotion or pay of employees nor any
     applicable federal or state wages and hours laws, nor any provisions of the
     Employee Retirement Income Security Act of 1974, as amended, or the rules
     and regulations promulgated thereunder, which singly, or in the aggregate,
     could be reasonably expected to have a Material Adverse Effect on the
     Company or its subsidiaries, taken as a whole.

          (p) The Company and each of its subsidiaries has such permits,
     licenses, franchises and authorizations of governmental or regulatory
     authorities ("PERMITS") including, without limitation, under any applicable
     Environmental Laws, as are necessary to own, lease and operate its
     respective properties and to conduct its respective business, except to the
     extent that the failure to have such Permits would not singly, or in the
     aggregate, have a Material Adverse Effect on the Company and its
     subsidiaries, taken as a whole; the Company and each of its subsidiaries
     has fulfilled and performed all of its material obligations with respect to
     such Permits and no event has occurred which has or after notice or lapse
     of time would singly, or in the aggregate, have a Material Adverse Effect
     on the Company and its subsidiaries, taken as a whole; and, except as
     described in the Prospectus, such Permits contain no restrictions that
     materially interfere with the business or operations of the Company or any
     of its subsidiaries as currently conducted.

          (q) In the ordinary course of its business, when the Company or any of
     its subsidiaries acquires a fee interest in a parcel of real property
     located in the


                                       6

<Page>



     United States, the Company conducts a review of the property (generally
     consisting of a Phase I environmental assessment or similar study prepared
     on behalf of the seller or a predecessor owner of such property) to
     determine whether any conditions exist on the property that would
     constitute a violation of Environmental Laws or would require a material
     amount of capital or operating expenditures for clean-up, closure or
     compliance with Environmental Laws. In the ordinary course of its business,
     when the Company or any of its subsidiaries enters into a long-term real
     property lease for property located in the United States, the Company
     conducts an internal review, which may or may not result in a Phase I
     environmental assessment or similar study (although the Company would
     typically obtain a Phase I or similar study where the Company would have
     the right to acquire a fee interest in such real property), as it relates
     to such real property to determine whether any conditions exist on the
     property that would constitute a violation of Environmental Laws or would
     require a material amount of capital or operating expenditures for
     clean-up, closure or compliance with Environmental Laws. In the ordinary
     course of its business, the Company utilizes local counsel to obtain advice
     regarding owned or leased real property and local environmental matters
     outside the United States. On the basis of such reviews and advice, the
     Company has concluded that such associated costs and liabilities would not,
     singly or in the aggregate, have a Material Adverse Effect on the Company
     and its subsidiaries, taken as a whole.

          (r) Except as otherwise set forth in the Prospectus or such as are not
     material to the business prospects, financial condition or results of
     operations of the Company and its subsidiaries, taken as a whole, the
     Company and each of its subsidiaries has good and marketable title, free
     and clear of all liens, claims, encumbrances and restrictions except liens
     for taxes not yet due and payable, to all property and assets described in
     the Prospectus as being owned by it. All leases to which the Company or any
     of its subsidiaries is a party are valid and binding and no default by the
     Company of any of its subsidiaries, by any other party, has occurred or is
     continuing thereunder, which might result singly, or in the aggregate, in a
     Material Adverse Effect to the Company or its subsidiaries, taken as a
     whole, and the Company and its subsidiaries enjoy peaceful and undisturbed
     possession under all such leases to which any of them is a party as lessee
     with such exceptions as do not have a Material Adverse Effect on the
     Company and its subsidiaries, taken as a whole.

          (s) The Company and each of its subsidiaries maintains, with insurers
     of recognized standing, reasonably adequate insurance against property and
     casualty loss, general liability, business interruption and such other
     losses and risks, in each case, in such amounts as are prudent and
     customary in the business in which they are engaged.

          (t) Arthur Andersen LLP, who certified certain consolidated financial
     statements and supporting schedules of the Company, were independent public
     accountants as required by the Securities Act, the Exchange Act and the
     respective Rules and Regulations thereunder.

          (u) Deloitte & Touche LLP, who are the current auditors of the
     Company, and RSM Robson Rhodes LLP who have certified certain financial
     statements


                                       7

<Page>


     of Iron Mountain Europe Limited, each are independent public accountants as
     required by the Securities Act, the Exchange Act and the respective Rules
     and Regulations thereunder.

          (v) The financial statements, together with related schedules and
     notes forming part of the Prospectus (and any amendment or supplement
     thereto), present fairly the consolidated financial position, results of
     operations and changes in financial position of the Company and its
     subsidiaries on the basis stated in the Prospectus at the respective dates
     or for the respective periods to which they apply; such statements and
     related schedules and notes have been prepared in accordance with generally
     accepted accounting principles consistently applied throughout the periods
     involved, except as disclosed therein; and the other financial and
     statistical information and data set forth in the Prospectus (and any
     amendment or supplement thereto) is, to the Company's knowledge, in all
     material respects, accurately presented and prepared on a basis reasonably
     consistent with the books and records of the Company.

          (w) Based on the knowledge of the chief executive officer and chief
     financial officer of the Company, (i) the Annual Report on Form 10-K, as
     amended by Amendment No. 1 on Form 10-K/A, for the year ended December 31,
     2002, and the Quarterly Reports on Form 10-Q for the quarters ended March
     31, 2003, June 30, 2003 and September 30, 2003 (each a "REPORT", and
     together, the "REPORTS"), fully comply with the requirements of Section
     13(a) or 15(d) of the Exchange Act; and (ii) the information contained in
     each Report fairly presents, in all material respects, the financial
     condition and results of operations of the Company as of the date of filing
     with the Commission.

          (x) The pro forma financial statements and other pro forma financial
     information (including the notes thereto) included or incorporated by
     reference in the Registration Statement and in the Prospectus, if any, (i)
     present fairly the information shown therein, (ii) have been prepared in
     accordance with Article 11 of Regulation S-X and the related Rules and
     Regulations adopted by the Commission with respect to pro forma financial
     statements and (iii) have been properly compiled on the basis described
     therein, and the assumptions used in the preparation of such pro forma
     financial statements and other pro forma financial information (including
     the notes thereto) are reasonable and the adjustments used therein are
     appropriate to give effect to the transactions or circumstances referred to
     therein.

          (y) The transactions contemplated by this Agreement (including,
     without limitation, the use of the proceeds from the sale of the Notes)
     will not violate or result in a violation of Section 7 of the Exchange Act,
     or any Rules and Regulations promulgated thereunder, including, without
     limitation, Regulations T, U and X of the Board of Governors of the Federal
     Reserve System.

          (z) Neither the Company nor any of its affiliates does business with
     the Government of Cuba or with any person or affiliate located in Cuba
     within the meaning of Section 517.075, Florida Statutes (Chapter 92 128,
     Laws of Florida).

                                       8

<Page>


          (aa) The Company has an authorized, issued and outstanding
     capitalization as set forth in the Prospectus and all of the outstanding
     shares of capital stock of the Company have been duly authorized and
     validly issued and are fully paid and nonassessable and were not issued in
     violation of or subject to any preemptive rights.

          (bb) There are no outstanding subscriptions, rights, warrants,
     options, calls, convertible securities, commitments for sale or liens
     related to or entitling any person to purchase or otherwise to acquire any
     shares of the capital stock of, or other ownership interest in, the Company
     (other than any such arrangements created exclusively by or relating
     exclusively to one or more of the Company's stockholders) or any wholly
     owned subsidiary thereof or with respect to any capital stock or other
     ownership interest that the Company or any of its subsidiaries (as defined
     in Regulation S-X Rule 1-02(x) of the Rules and Regulations) owns in a less
     than wholly owned subsidiary except as otherwise disclosed in the
     Prospectus or such as are not material to the business prospects, financial
     condition or results of operations of the Company and its subsidiaries,
     taken as a whole.

          (cc) The Company has disclosed in the Prospectus any business
     relationships or related party transactions of the type that is required to
     be disclosed by Item 404 of Regulation S-K of the Rules and Regulations.

          (dd) There is (i) no significant unfair labor practice complaint
     pending against the Company or any of its subsidiaries or, to the best
     knowledge of the Company, threatened against any of them, before the
     National Labor Relations Board or any foreign, state or local labor
     relations board, and no significant grievance or arbitration proceeding
     arising out of or under any collective bargaining agreement is pending
     against the Company or any of its subsidiaries or, to the best knowledge of
     the Company, threatened against any of them, and (ii) no significant
     strike, labor dispute, slowdown or stoppage pending against the Company or
     any of its subsidiaries or, to the best knowledge of the Company,
     threatened against it or any of its subsidiaries, which, singly or in the
     aggregate, could not reasonably be expected to have a Material Adverse
     Effect.

          (ee) The chief executive officer and chief financial officer of the
     Company are responsible for establishing and maintaining disclosure
     controls and procedures (as defined in Rules 13a-14 and 15d-14 of the Rules
     and Regulations under the Exchange Act) for the Company and have (i)
     designed such disclosure controls and procedures to ensure that material
     information relating to the Company and its subsidiaries is made known to
     the chief executive officer and chief financial officer by others within
     the Company and its subsidiaries, (ii) evaluated the effectiveness of the
     of the Company's disclosure controls and procedures as of a date (the
     "EVALUATION DATE") within 90 days prior to the filing of each of the
     Reports, and (iii) presented in each Report their conclusions about the
     effectiveness of the disclosure controls and procedures based on their
     evaluation as of the Evaluation Date. The chief executive officer and chief
     financial officer of the Company have disclosed, based upon their
     evaluation as of the Evaluation Date, to the Company's auditors and the
     Audit Committee of the Company's Board of Directors (i) all significant
     deficiencies in the design or operation of internal


                                       9

<Page>


     controls which could adversely affect the Company's ability to record,
     process, summarize and report financial data and have identified for the
     Company's auditors any material weaknesses in internal controls, and (ii)
     any fraud, whether or not material, that involves management or other
     employees who have a significant role in the registrant's internal
     controls. The chief executive officer and chief financial officer have
     indicated in each Report whether or not there were significant changes in
     internal controls or in other factors that could significantly affect
     internal controls subsequent to the Evaluation Date, including any
     corrective actions with regard to significant deficiencies and material
     weaknesses.

          (ff) The Company and each of its subsidiaries maintains a system of
     internal accounting controls sufficient to provide reasonable assurance
     that (i) transactions are executed in accordance with management's general
     or specific authorizations, (ii) transactions are recorded as necessary to
     permit preparation of financial statements in conformity with generally
     accepted accounting principles and to maintain asset accountability, (iii)
     access to assets is permitted only in accordance with management's general
     or specific authorization and (iv) the recorded accountability for assets
     is compared with existing assets at reasonable intervals and appropriate
     action is taken with respect to any differences.

          (gg) All material tax returns required to be filed by the Company and
     each of its subsidiaries in any jurisdiction have been filed, other than
     those filings being contested in good faith, and all material taxes,
     including withholding taxes, penalties and interest, assessments, fees and
     other charges due pursuant to such returns or pursuant to any assessment
     received by the Company or any of its subsidiaries, have been paid, other
     than those being contested in good faith and for which adequate reserves
     have been provided.

          (hh) The Company and its subsidiaries own or possess, or can acquire
     on reasonable terms, all material patents, patent applications, trademarks,
     service marks, trade names, licenses, copyrights and proprietary or other
     confidential information currently employed by them in connection with
     their respective businesses, and neither the Company nor any such
     subsidiary has received any notice of infringement of or conflict with
     asserted rights of any third party with respect to any of the foregoing
     which, singly or in the aggregate, if the subject of an unfavorable
     decision, ruling or finding, would result in a Material Adverse Effect,
     except as described in or contemplated by the Prospectus.

          (ii) No Restricted Subsidiary (as defined in the Indenture) of the
     Company is currently prohibited, directly or indirectly, from paying any
     dividends to the Company, from making any other distribution on such
     Restricted Subsidiary's capital stock, from repaying to the Company any
     loan or advances to such Restricted Subsidiary from the Company or from
     transferring any of such Restricted Subsidiary's property or assets to the
     Company or any other Restricted Subsidiary of the Company, except as
     described in or contemplated by the Prospectus.


                                       10


<Page>



          (jj) Immediately after each of the Guarantors has entered into the
     Guarantee to which it is a party, (i) the fair value of the assets of such
     Guarantor will exceed the debts and liabilities, subordinated, contingent
     or otherwise, of such Guarantor, (ii) the present fair saleable value of
     the property of such Guarantor will be greater than the amount that will be
     required to pay the probable liabilities of such Guarantor on its debts and
     other liabilities, subordinated, contingent or otherwise, as such debts and
     other liabilities, subordinated, contingent or otherwise, become absolute
     and matured, (iii) such Guarantor will be able to pay its debts and other
     liabilities, subordinated, contingent or otherwise, as such debts and other
     liabilities become absolute and matured, and (iv) such Guarantor will not
     have an unreasonably small capital with which to conduct the business in
     which it is engaged as such business is conducted and is proposed to be
     conducted following the Closing Date.

          (kk) Neither the Company nor any of its subsidiaries intends, or
     intends to permit any of its respective subsidiaries, to incur debts beyond
     its ability to pay such debts as they mature, taking into account the
     timing and the amounts of cash to be received by the Company or any of its
     subsidiaries and the timing and the amounts of cash to be payable on or in
     respect of the Company's indebtedness or the indebtedness of each
     subsidiary.

          (ll) Except as have been irrevocably waived in writing, no holder of
     securities of the Company has any rights to the registration of securities
     of the Company because of the filing of the Registration Statement or
     otherwise in connection with the sale of the Notes contemplated hereby.

          (mm) None of the Company and the Guarantors is, or upon consummation
     of the transactions contemplated under this Agreement and the Indenture
     will be, an "investment company" or a company "controlled" by an
     "investment company" within the meaning of the Investment Company Act of
     1940, as amended (the "INVESTMENT COMPANY ACT") or be subject to
     registration under the Investment Company Act.

          (nn) There are no contracts or other documents that are required to be
     described in the Prospectus or filed as exhibits to the Registration
     Statement by the Securities Act or by the Rules and Regulations that have
     not been so described or filed.

          (oo) The statistical and market-related data included in the
     Prospectus is based on or derived from sources which the Company believes
     to be reliable and accurate.

2.   PURCHASE, SALE AND DELIVERY OF THE NOTES.

          (a) On the basis of the representations, warranties, covenants and
     agreements herein contained, but subject to the terms and conditions herein
     set forth, the Company agrees to sell to the Underwriters and the
     Underwriters, severally and not jointly, agree to purchase from the
     Company, the aggregate principal amount of the Notes

                                       11

<Page>

     set forth opposite the name of such Underwriter on Schedule I hereto, at
     the purchase price set forth opposite the name of such Underwriter on
     Schedule I hereto.

          (b) Payment of the purchase price for, and delivery of certificates
     for, the Notes shall be made at the office of Latham & Watkins LLP, 885
     Third Avenue, New York, New York 10022 ("UNDERWRITERS' COUNSEL"), or at
     such other place as shall be agreed upon by you and the Company, at 10:00
     A.M., New York City time, on the seventh business day, as permitted under
     Rule 15c6-1 under the Exchange Act, (unless postponed in accordance with
     the provisions of Section 6 or Section 9 hereof) following the date hereof
     or such other time not later than thirteen business days after such date as
     shall be agreed upon by you and the Company (such time and date of payment
     and delivery being herein called the "CLOSING DATE").

          (c) Payment for the Notes shall be made to or upon the order of the
     Company of the purchase price by wire transfer in Federal (same day) funds
     to the Company or as directed by the Company upon delivery of certificates
     for the Notes to you through the facilities of The Depository Trust Company
     for the respective accounts of the several Underwriters against receipt
     therefor signed by you or on your behalf. The Notes to be delivered to you
     shall be registered in such name or names and shall be in such
     denominations as you may request at least two business days before the
     Closing Date. The Company will permit you to examine and package such
     certificates for delivery at least one full business day prior to the
     Closing Date.

3.   OFFERING. Upon the Company's authorization of the release of the Notes, the
     Underwriters propose to offer the Notes for sale to the public upon the
     terms and conditions set forth in the Prospectus.

4.   COVENANTS OF THE COMPANY. The Company covenants and agrees with each of the
     Underwriters and with the Independent Underwriter that:

          (a) If, at any time when a prospectus relating to the Notes is
     required to be delivered under the Act, any event shall have occurred as a
     result of which the Prospectus as then amended or supplemented would, in
     the judgment of the Underwriters and the Independent Underwriter or the
     Company include an untrue statement of a material fact or omit to state any
     material fact required to be stated therein or necessary to make the
     statements therein, in the light of the circumstances under which they were
     made, not misleading, or if it shall be necessary at any time to amend or
     supplement the Prospectus or Registration Statement to comply with the
     Securities Act or the Rules and Regulations, or to file under the Exchange
     Act so as to comply therewith any document incorporated by reference in the
     Registration Statement or the Prospectus or in any amendment thereof or
     supplement thereto, the Company will notify you promptly and prepare and
     file with the Commission an appropriate amendment or supplement (in form
     and substance satisfactory to you) which will correct such statement or
     omission or which will effect such compliance and will use its best efforts
     to have any amendment to the Registration Statement declared effective as
     soon as possible.


                                       12
<Page>


          (b) The Company will promptly deliver to each of the Underwriters and
     the Independent Underwriter such number of copies of any Preliminary
     Prospectus, the Prospectus, the Registration Statement, all amendments of
     and supplements to such documents, if any, all documents incorporated by
     reference in the Registration Statement and Prospectus or any amendment
     thereof or supplement thereto, as you may reasonably request. Prior to
     10:00 A.M., New York time, or if it is not possible to do so prior to such
     time, as soon thereafter as practicable, on the business day next
     succeeding the date of this Agreement and from time to time thereafter the
     Company will furnish the Underwriters and the Independent Underwriter with
     copies of the Prospectus in New York City in such quantities as you may
     reasonably request. The Company will timely file the Prospectus with the
     Commission as required by Rule 424(b) of the Rules and Regulations.

          (c) The Company will endeavor in good faith, in cooperation with you,
     at or prior to the date of the Prospectus, to qualify the Notes for
     offering and sale under the securities or Blue Sky laws of such
     jurisdictions as you may designate and to maintain such qualification in
     effect for so long as required for the distribution thereof; except that in
     no event shall the Company be obligated in connection therewith to qualify
     as a foreign corporation or to execute a general consent to service of
     process where it is not already so subject.

          (d) The Company will make generally available (within the meaning of
     Section 11(a) of the Securities Act) to its security holders and to the
     Underwriters and the Independent Underwriter as soon as practicable, but in
     any event not later than 45 days after the end of its fiscal quarter in
     which the first anniversary date of the date of the Prospectus occurs, an
     earnings statement of the Company and its subsidiaries (which need not be
     audited) complying with the provisions of Rule 158 of the Regulation
     covering a period of at least twelve consecutive months beginning after the
     effective date of the Registration Statement.

          (e) During the period from the date hereof until 45 calendar days
     after the Closing Date, the Company shall not offer, sell, contract to sell
     or otherwise dispose of any debt securities of the Company or any Guarantor
     or warrants to purchase debt securities of the Company or any Guarantor
     substantially similar to the Notes (other than (i) the Notes, (ii) the
     Guarantees and (iii) commercial papers issued in the ordinary course of
     business), without the Representative's prior written consent.

          (f) Whether or not required by the Rules and Regulations, so long as
     any Notes are outstanding and so long as the Indenture so requires, the
     Company will furnish to you at your reasonable request copies of all
     reports or other communications (financial or other) furnished to security
     holders, and to deliver to you (i) as soon as they are available, copies of
     any and all reports and financial statements furnished to or filed with the
     Commission or any national securities exchange on which any class of
     securities of the Company is listed; and (ii) such additional information
     concerning the business and financial condition of the Company as you may
     from time to time reasonably request (such financial statements to be on a
     consolidated basis to the


                                       13
<Page>

     extent the accounts of the Company and its subsidiaries are consolidated in
     reports furnished to its security holders generally or to the Commission).


          (g) The Company will apply the proceeds from the sale of the Notes as
     set forth under "Use of Proceeds" in the Prospectus.


          (h) The Company will use its best efforts to do or perform, or cause
     to be done or performed, all things required or necessary to be done and
     performed under this Agreement by the Company and the Guarantors prior to
     the Closing Date and to satisfy all conditions precedent to the delivery of
     the Notes.

          (i) The Company will use its best efforts in cooperation with the
     Underwriters to permit the Notes to be eligible for clearance and
     settlement through the facilities of The Depository Trust Company.

          (j) The Company will take all reasonable action necessary to enable
     Standard & Poor's Corporation ("S&P") and Moody's Investors Service, Inc.
     ("MOODY'S") to reaffirm their respective credit ratings on the Company's
     outstanding senior subordinated debt, including for this purpose, the
     issuance of the Notes.

          (k) The Company has not and will not (and has not permitted its
     affiliates to, and will cause its affiliates not to) take, directly or
     indirectly, any action which is designed to or which constitutes or which
     might reasonably be expected to cause or result in the stabilization or
     manipulation of the price of any security of the Company to facilitate the
     sale or resale of the Notes and neither the Company nor any of its
     affiliated purchasers (as defined in Rule 100 of Regulation M under the
     Exchange Act) will take any action prohibited by Regulation M under the
     Exchange Act.

          (l) The Company, during the period when the Prospectus is required to
     be delivered under the Act or the Exchange Act, will file all documents
     required to be filed with the Commission pursuant to Section 13, 14 or 15
     of the Exchange Act within the time periods required by the Exchange Act
     and the rules and regulations thereunder.

5.   PAYMENT OF EXPENSES. Whether or not the transactions contemplated in this
     Agreement are consummated or this Agreement is terminated, the Company
     hereby agrees to pay all costs and expenses incident to the performance of
     the obligations of the Company hereunder, including the following: (i) the
     fees, disbursements and expenses of the Company's counsel and accountants
     in connection with the registration of the Notes under the Act and all
     other expenses in connection with the preparation, printing and filing of
     the Registration Statement, any Preliminary Prospectus and the Prospectus
     and amendments and supplements thereto and the mailing and delivering of
     copies thereof to the Underwriters, the Independent Underwriter and
     dealers; (ii) the cost of producing the Blue Sky Memoranda, all expenses in
     connection with the qualification of the Notes for offering and sale under
     state securities or Blue Sky laws as provided in Section 4(c) hereof,
     including the fees and disbursements of counsel for the Underwriters and
     the Independent Underwriter in connection with such


                                       14

<Page>


     qualification and in connection with the Blue Sky survey; (iii) all fees
     and expenses in connection with the inclusion of the Notes in the
     book-entry system of The Depository Trust Company; (iv) all travel expenses
     of the Company's officers and employees and any other expense of the
     Company incurred in connection with attending or hosting meetings with
     prospective purchasers of the Notes; (v) fees paid to rating agencies in
     connection with the Notes and (vi) the filing fees incident to, and the
     fees and disbursements of counsel for the Underwriters and the Independent
     Underwriter in connection with, securing any required review by the
     National Association of Securities Dealers, Inc. of the terms of the sale
     of the Notes. The Company also will pay or cause to be paid: (i) the cost
     of preparing certificates for the Notes; (ii) the cost and charges of any
     transfer agent or registrar; and (iii) all other costs and expenses
     incident to the performance of its obligations hereunder which are not
     otherwise specifically provided for in this Section 5.

6.   CONDITIONS OF UNDERWRITERS' OBLIGATIONS. The obligations of the
     Underwriters and the Independent Underwriter to purchase and pay for the
     Notes under this Agreement are subject to the satisfaction of each of the
     following conditions:

          (a) The Registration Statement shall have become, and shall remain,
     effective on the date of this Agreement and through the Closing Date; the
     Prospectus shall have been filed with the Commission in a timely fashion in
     accordance with Section 4(b) hereof; and, at or prior to the Closing Date
     no stop order suspending the effectiveness of the Registration Statement or
     any post-effective amendment thereof shall have been issued and no
     proceedings therefor shall have been initiated or threatened by the
     Commission.

          (b) All the representations and warranties of the Company contained in
     this Agreement shall be true and correct on the Closing Date with the same
     force and effect as if made on and as of the Closing Date.

          (c) Subsequent to the execution and delivery of this Agreement and
     prior to the Closing Date, there shall not have been any downgrading, nor
     shall any notice have been given of any intended or potential downgrading
     in the rating accorded any of the Company's securities by any nationally
     recognized securities rating organization, or any public announcement that
     any such organization has under surveillance or review its rating of any
     such securities (other than an announcement with positive implications of a
     possible upgrading, and no implication of a possible downgrading of such
     rating).

          (d) (i) Since the date of the latest balance sheet included in the
     Prospectus, there shall not have been any material adverse change, or any
     development involving a prospective material adverse change, in the
     business prospects, financial condition or results of operations of the
     Company and its subsidiaries taken as a whole, whether or not arising in
     the ordinary course of business, except as otherwise described in the
     Registration Statement or Prospectus, (ii) as of the Closing Date, the
     obligations of the Company to be performed hereunder on or prior thereto
     have been duly performed, (iii) since the date of the latest balance sheet
     included in the Prospectus there shall not


                                       15

<Page>

          have been any material adverse change, or any development involving a
     prospective material adverse change, in the capital stock or in the
     long-term debt of the Company from that set forth in the Prospectus, except
     as otherwise described in the Registration Statement or Prospectus, (iv)
     the Company and its subsidiaries shall have no liability or obligation,
     direct or contingent, which is material to the Company and its
     subsidiaries, taken as a whole, other than those in the Registration
     Statement or Prospectus, and (v) on the Closing Date you shall have
     received a certificate dated the Closing Date, signed by C. Richard Reese,
     in his capacity as Chairman of the Board and Chief Executive Officer, and
     by John F. Kenny, Jr., in his capacity as Executive Vice President and
     Chief Financial Officer of the Company, confirming the matters set forth in
     paragraphs (a), (b), (c) and (d) of this Section 6.

          (e) At the Closing Date you shall have received the written opinion of
     Sullivan & Worcester LLP, counsel for the Company, dated the Closing Date,
     addressed to the Underwriters in the form attached hereto as Annex I and in
     form and substance reasonably satisfactory to the Underwriters and
     Underwriters' Counsel.

          (f) At the Closing Date you shall have received the written opinion of
     Garry Watzke, Esq., General Counsel for the Company, dated the Closing
     Date, addressed to the Underwriters in the form attached hereto as Annex II
     and in form and substance reasonably satisfactory to the Underwriters and
     Underwriters' Counsel.

          (g) At the Closing Date you shall have received the written opinion of
     Ballard Spahr Andrews & Ingersoll, LLP, special Pennsylvania counsel to the
     Company, dated the Closing Date, addressed to the Underwriters in the form
     attached hereto as Annex III and in form and substance reasonably
     satisfactory to the Underwriters and Underwriters' Counsel.

          (h) The Underwriters shall have received on the Closing Date the
     written opinion of Latham & Watkins LLP, counsel for the Underwriters,
     dated the Closing Date, as to such matters as the Underwriters shall
     reasonably request.

          (i) The Underwriters shall have received (i) a letter or letters on
     and as of the date of this Agreement (each, an "INITIAL LETTER"), in form
     and substance satisfactory to you, from each of Deloitte & Touche LLP (with
     respect to Iron Mountain Incorporated) and RSM Robson Rhodes (with respect
     to Iron Mountain Europe Limited), each independent public accountants, with
     respect to the financial statements and certain financial information
     contained in the Prospectus and letters on and as of the Closing Date, in
     form and substance satisfactory to you, from each of Deloitte & Touche LLP
     and RSM Robson Rhodes confirming the information contained in the initial
     letter or letters provided by such accountants, and (ii) a certificate
     dated as of the date of this Agreement, signed by C. Richard Reese, in his
     capacity as Chairman of the Board and Chief Executive Officer of the
     Company, and by John F. Kenny, Jr., in his capacity as Executive Vice
     President and Chief Financial Officer of the Company, with respect to the
     consolidated financial statements, and related schedules and notes, of the
     Company audited by Arthur Andersen LLP and incorporated by reference into
     the Registration Statement.


                                       16
<Page>


          (j) Subsequent to the execution and delivery of this Agreement or, if
     earlier, the dates as of which information is given in the Registration
     Statement (exclusive of any amendment thereof) and the Prospectus
     (exclusive of any supplement thereto), there shall not have been any change
     in the capital stock or long-term debt of the Company or any of its
     subsidiaries or any change, or any development involving a prospective
     change, in or affecting the condition (financial or otherwise), results of
     operations, business, properties or prospects of the Company and its
     subsidiaries taken as a whole, the effect of which, in any such case
     described above, is, in the judgment of the Underwriters and the
     Independent Underwriter, so material and adverse as to make it
     impracticable or inadvisable to proceed with the public offering or the
     delivery of the Notes on the terms and in the manner contemplated in the
     Prospectus (exclusive of any supplement).

          (k) The Company shall have complied with the provisions of Section
     4(b) hereof with respect to the furnishing of Prospectuses on the next
     business day succeeding the date of this Agreement.

          (l) On or prior to the Closing Date, The Depository Trust Company
     shall have accepted the Notes for clearance.

          (m) The Company shall have furnished the Underwriters and
     Underwriters' Counsel with such other certificates, opinions or other
     documents as they may have reasonably requested.

     If any of the conditions specified in this Section 6 shall not have been
fulfilled when and as required by this Agreement, or if any of the certificates,
opinions, written statements or letters furnished to you or to Underwriters'
Counsel pursuant to this Section 6 shall not be in all material respects
reasonably satisfactory in form and substance to you and to Underwriters'
Counsel, all obligations of the Underwriters and the Independent Underwriter
hereunder may be cancelled by you at, or at any time prior to, the Closing Date.
Notice of such cancellation shall be given to the Company in writing, or by
telephone. Any such telephone notice shall be confirmed promptly thereafter in
writing.

7.   INDEMNIFICATION.

          (a) Each of the Company and the Guarantors shall indemnify and hold
     harmless each Underwriter, the Independent Underwriter and each person, if
     any, who controls any Underwriter or Independent Underwriter within the
     meaning of Section 15 of the Act or Section 20(a) of the Exchange Act,
     against any and all losses, liabilities, claims, damages and expenses
     whatsoever as incurred (including, but not limited to, attorneys' fees and
     any and all expenses whatsoever incurred in investigating, preparing or
     defending against any litigation, commenced or threatened, or any claim
     whatsoever, and any and all amounts paid in settlement of any claim or
     litigation), joint or several, to which they or any of them may become
     subject under the Act, the Exchange Act or otherwise, insofar as such
     losses, liabilities, claims, damages or expenses (or actions in respect
     thereof) arise out of or are based upon any untrue statement or alleged

                                       17
<Page>

     untrue statement of a material fact contained in the Registration Statement
     as originally filed or any amendment thereof, or related Preliminary
     Prospectus, if any, or the Prospectus, or in any supplement thereto or
     amendment thereof, or arise out of or are based upon the omission or
     alleged omission to state therein a material fact required to be stated
     therein or necessary to make the statements therein not misleading;
     provided, however, that the Company will not be liable in any such case to
     the extent but only to the extent that any such loss, liability, claim,
     damage or expense arises out of or is based upon any such untrue statement
     or alleged untrue statement or omission or alleged omission made therein in
     reliance upon and in conformity with written information furnished to the
     Company by or on behalf of any Underwriter or Independent Underwriter
     through you expressly for use therein. This indemnity agreement will be in
     addition to any liability which the Company may otherwise have including
     under this Agreement.

          (b) Each Underwriter, severally and not jointly, shall indemnify and
     hold harmless the Company and the Independent Underwriter, each of the
     directors of the Company, each of the officers of the Company who shall
     have signed the Registration Statement, and each other person, if any, who
     controls the Company or the Independent Underwriter within the meaning of
     Section 15 of the Act or Section 20(a) of the Exchange Act, against any
     losses, liabilities, claims, damages and expenses whatsoever as incurred
     (including, but not limited to, attorneys' fees and any and all expenses
     whatsoever incurred in investigating, preparing or defending against any
     litigation, commenced or threatened, or any claim whatsoever, and any and
     all amounts paid in settlement of any claim or litigation), joint or
     several, to which they or any of them may become subject under the Act, the
     Exchange Act or otherwise, insofar as such losses, liabilities, claims,
     damages or expenses (or actions in respect thereof) arise out of or are
     based upon any untrue statement or alleged untrue statement of a material
     fact contained in the Registration Statement, as originally filed or any
     amendment thereof, or related Preliminary Prospectus, if any, or the
     Prospectus, or in any amendment thereof or supplement thereto, or arise out
     of or are based upon the omission or alleged omission to state therein a
     material fact required to be stated therein or necessary to make the
     statements therein not misleading, in each case to the extent, but only to
     the extent, that any such loss, liability, claim, damage or expense arises
     out of or is based upon any such untrue statement or alleged untrue
     statement or omission or alleged omission made therein in reliance upon and
     in conformity with written information furnished to the Company by or on
     behalf of any Underwriter through you expressly for use therein. This
     indemnity will be in addition to any liability which any Underwriter may
     otherwise have including under this Agreement.

          (c) The Independent Underwriter shall indemnify and hold harmless the
     Company and each Underwriter, each of the directors of the Company, each of
     the officers of the Company who shall have signed the Registration
     Statement, and each other person, if any, who controls the Company or any
     Underwriter within the meaning of Section 15 of the Act or Section 20(a) of
     the Exchange Act, against any losses, liabilities, claims, damages and
     expenses whatsoever as incurred (including but not limited to attorneys'
     fees and any and all expenses whatsoever incurred in investigating,
     preparing or defending against any litigation, commenced or threatened, or


                                       18
<Page>


     any claim whatsoever, and any and all amounts paid in settlement of any
     claim or litigation), joint or several, to which they or any of them may
     become subject under the Act, the Exchange Act or otherwise, insofar as
     such losses, liabilities, claims, damages or expenses (or actions in
     respect thereof) arise out of or are based upon any untrue statement or
     alleged untrue statement of a material fact contained in the Registration
     Statement, as originally filed or any amendment thereof, or related
     Preliminary Prospectus, if any, or the Prospectus, or in any amendment
     thereof or supplement thereto, or arise out of or are based upon the
     omission or alleged omission to state therein a material fact required to
     be stated therein or necessary to make the statements therein not
     misleading, in each case to the extent, but only to the extent, that any
     such loss, liability, claim, damage or expense arises out of or is based
     upon any such untrue statement or alleged untrue statement or omission or
     alleged omission made therein in reliance upon and in conformity with
     written information furnished to the Company by or on behalf of the
     Independent Underwriter expressly for use therein.

          (d) Promptly after receipt by an indemnified party under subsection
     (a), (b) or (c) above of notice of any claims or the commencement of any
     action, such indemnified party shall, if a claim in respect thereof is to
     be made against the indemnifying party under such subsection, notify each
     party against whom indemnification is to be sought in writing of the claim
     or the commencement thereof (but the failure so to notify an indemnifying
     party shall not relieve it from any liability which it may have under this
     Section 7). In case any such claim or action is brought against any
     indemnified party, and it notifies an indemnifying party of the
     commencement thereof, the indemnifying party will be entitled to
     participate therein, and to the extent it may elect by written notice
     delivered to the indemnified party promptly after receiving the aforesaid
     notice from such indemnified party, to assume the defense thereof with
     counsel satisfactory to such indemnified party. Notwithstanding the
     foregoing, the indemnified party or parties shall have the right to employ
     its or their own counsel in any such case, but the fees and expenses of
     such counsel shall be at the expense of such indemnified party or parties
     unless (i) the employment of such counsel shall have been authorized in
     writing by one of the indemnifying parties in connection with the defense
     of such action, (ii) the indemnifying parties shall not have employed
     counsel to have charge of the defense of such action within a reasonable
     time after notice of commencement of the action or (iii) such indemnified
     party or parties shall have reasonably concluded that there may be defenses
     available to it or them which are different from or additional to those
     available to one or all of the indemnifying parties (in which case the
     indemnifying parties shall not have the right to direct the defense of such
     action on behalf of the indemnified party or parties), in any of which
     events such fees and expenses shall be borne by the indemnifying parties.
     No indemnifying party shall, without the prior written consent of the
     indemnified party, effect any settlement or compromise of, or consent to
     the entry of judgment with respect to, any pending or threatened action in
     respect of which the indemnified party is or reasonably could have been a
     party and indemnity or contribution may be or could have been sought
     hereunder by the indemnified party, unless such settlement, compromise or
     judgment (i) includes an unconditional release of the indemnified party
     from all liability on claims that are or reasonably could have been the
     subject matter of such action and (ii) does not include a statement as to
     or an admission of fault, culpability or a failure to act, by or on behalf
     of the indemnified party.


                                       19
<Page>


8.   CONTRIBUTION. In order to provide for contribution in circumstances in
     which the indemnification provided for in Section 7 hereof is for any
     reason held to be unavailable from any indemnifying party or is
     insufficient to hold harmless a party indemnified thereunder, the Company,
     the Independent Underwriter and the Underwriters shall contribute to the
     aggregate losses, liabilities, claims, damages and expenses of the nature
     contemplated by such indemnification provision (including any
     investigation, legal and other expenses incurred in connection with, and
     any amount paid in settlement of, any action, suit or proceeding or any
     claims asserted, but after deducting, in the case of losses, liabilities,
     claims, damages and expenses suffered by the Company any contribution
     received by the Company from persons, other than the Independent
     Underwriter or the Underwriters, who may also be liable for contribution,
     including persons who control the Company within the meaning of Section 15
     of the Act or Section 20(a) of the Exchange Act, officers of the Company
     who signed the Registration Statement and directors of the Company) as
     incurred to which the Company, the Independent Underwriter and one or more
     of the Underwriters may be subject, in such proportions as is appropriate
     to reflect the relative benefits received by the Company, the Independent
     Underwriter and the Underwriters from the offering of the Notes or, if such
     allocation is not permitted by applicable law, in such proportion as is
     appropriate to reflect not only the relative benefits referred to above but
     also the relative fault of the Company, the Independent Underwriter and the
     Underwriters in connection with the statements or omissions which resulted
     in such losses, claims, damages, liabilities or expenses, as well as any
     other relevant equitable considerations. The relative benefits received by
     the Company, the Independent Underwriter and the Underwriters shall be
     deemed to be in the same proportion as (x) the total proceeds from the
     offering (net of underwriting discounts and commissions but before
     deducting expenses) received by the Company and (y) the underwriting
     discount received by the Underwriters bear to the total price to the public
     of the Notes, in each case as set forth in the Prospectus. The relative
     fault of the Company and of the Underwriters shall be determined by
     reference to, among other things, whether the untrue or alleged untrue
     statement of a material fact or the omission or alleged omission to state a
     material fact relates to information supplied by the Company on the one
     hand or either the Independent Underwriter or the Underwriters on the other
     hand and the parties' relative intent, knowledge, access to information and
     opportunity to correct or prevent such statement or omission. The Company
     and the Underwriters agree that it would not be just and equitable if
     contribution pursuant to this Section 8 were determined by pro rata
     allocation (even if the Underwriters were treated as one entity for such
     purpose) or by any other method of allocation which does not take account
     of the equitable considerations referred to above. Notwithstanding the
     provisions of this Section 8, neither the Independent Underwriter nor any
     Underwriter shall be required to contribute any amount in excess of the
     amount by which the total price at which the Notes underwritten by it and
     distributed to the public were offered to the public exceeds the amount of
     any damages which such Underwriter or the Independent Underwriter has
     otherwise been required to pay by reason of such untrue or alleged untrue
     statement or omission or alleged omission. No person guilty of fraudulent
     misrepresentation (within in the meaning of Section 11(f) of the Act) shall
     be entitled to contribution from any person who was not guilty of such
     fraudulent misrepresentation. For purposes of this Section 8, each person,
     if any, who controls an Underwriter or the


                                       20
<Page>

     Independent Underwriter within the meaning of Section 15 of the Act or
     Section 20(a) of the Exchange Act shall have the same rights to
     contribution as such Underwriter or the Independent Underwriter, and each
     person, if any, who controls the Company within the meaning of Section 15
     of the Act or Section 20(a) of the Exchange Act, each officer of the
     Company who shall have signed the Registration Statement and each director
     of the Company shall have the same rights to contribution as the Company,
     subject in each case to clauses (i) and (ii) of this Section 8. Any party
     entitled to contribution will, promptly after receipt of notice of
     commencement of any action, suit or proceeding against such party in
     respect of which a claim for contribution may be made against another party
     or parties, notify each party or parties from whom contribution may be
     sought, but the omission to so notify such party or parties shall not
     relieve the party or parties from whom contribution may be sought from any
     obligation it or they may have under this Section 8 or otherwise. The
     obligations of the Underwriters to contribute pursuant to this Section 8
     are several in proportion to the respective principal amount of Notes
     purchased by each of the Underwriters hereunder and not joint.

9.   DEFAULT BY AN UNDERWRITER.

          (a) If one or more of the Underwriters shall fail at the Closing Date
     to purchase the Notes which it or they are obligated to purchase under this
     Agreement (the "DEFAULTED NOTES") and such Defaulted Notes do not exceed in
     the aggregate 10% of the aggregate principal amount of the Notes, then each
     non-defaulting Underwriter shall purchase an aggregate amount of the
     Defaulted Notes equal to the proportion that the aggregate principal amount
     of Notes to be purchased by such Underwriter as set forth opposite such
     Underwriter's name on Schedule I hereto bears to the aggregate principal
     amount of Notes to be purchased by all non-defaulting Underwriters.

          (b) Notwithstanding the foregoing, if the Defaulted Notes equal or
     exceed in the aggregate 10% of the aggregate principal amount of the Notes,
     then the non-defaulting Underwriters shall have the right, within 48 hours
     after the Closing Date, to make arrangements for one or more of such
     non-defaulting Underwriters to purchase all, but not less than all, of the
     Defaulted Notes in such amounts as may be agreed upon among such
     non-defaulting Underwriters and upon the terms herein set forth; PROVIDED
     that if the non-defaulting Underwriters shall not have completed such
     arrangements within such 48-hour period, then this Agreement shall
     terminate without liability on the part of the non-defaulting Underwriters
     or the Company and the Guarantors.

     No action taken pursuant to this Section 9 shall relieve any defaulting
Underwriter from liability in respect of its default.

     In the event of any such default which does not result in a termination of
this Agreement, any of the non-defaulting Underwriters or the Company shall have
the right to postpone the Closing Date for a period not exceeding seven days in
order to effect any required changes in the Prospectus or in any other documents
or arrangements.


                                       21

<Page>


10.  SURVIVAL OF REPRESENTATIONS AND AGREEMENTS. All representations and
     warranties, covenants and agreements of the Underwriters, the Independent
     Underwriter and the Company contained in this Agreement, including the
     agreements contained in Section 5, the indemnity agreements contained in
     Section 7 and the contribution agreements contained in Section 8, shall
     remain operative and in full force and effect regardless of any
     investigation made by or on behalf of any Underwriter or any controlling
     person thereof, the Independent Underwriter or any controlling person
     thereof or by or on behalf of the Company, any of its officers and
     directors or any controlling person thereof, and shall survive delivery of
     and payment for the Notes to and by the Underwriters. The representations
     contained in Section 1 and the agreements contained in Sections 5, 7, 8 and
     11(d) hereof shall survive the termination of this Agreement, including
     termination pursuant to Section 9 or 11 hereof.

11.  EFFECTIVE DATE OF AGREEMENT; TERMINATION.

          (a) This Agreement shall become effective upon the later of when (i)
     you and the Company shall have received notification of the effectiveness
     of the Registration Statement or (ii) the execution of this Agreement.
     Until this Agreement becomes effective as aforesaid, it may be terminated
     by the Company by notifying you or by you by notifying the Company.
     Notwithstanding the foregoing, the provisions of this Section 11 and of
     Sections 1, 5, 7 and 8 hereof shall at all times be in full force and
     effect.

          (b) You shall have the right to terminate this Agreement at any time
     prior to the Closing Date: (A) if any domestic or international event or
     act or occurrence has materially disrupted, or in your opinion will in the
     immediate future materially disrupt, the market for the Company's
     securities or securities in general; or (B) if trading on the New York
     Stock Exchange (the "NYSE") or the NASDAQ National Market (the "NASDAQ")
     shall have been suspended or been made subject to material limitations, or
     minimum or maximum prices for trading shall have been fixed, or maximum
     ranges for prices for securities shall have been required, on the NYSE or
     the NASDAQ or by order of the Commission or any other governmental
     authority having jurisdiction; or (C) if a banking moratorium has been
     declared by any state or federal authority or if any material disruption in
     commercial banking or securities settlement or clearance services shall
     have occurred; or (D) if any downgrading shall have occurred in the
     Company's corporate credit rating or the rating accorded the Company's debt
     securities by any "nationally recognized statistical rating organization"
     (as defined for purposes of Rule 436(g) under the Act;) or if any such
     organization shall have publicly announced that it has under surveillance
     or review, with possible negative implications, its rating of any of the
     Company's debt securities; or (E) (i) if there shall have occurred any
     outbreak or escalation of hostilities or acts of terrorism involving the
     United States or there is a declaration of a national emergency or war by
     the United States or (ii) if there shall have been any other calamity or
     crisis or any change in political, financial or economic conditions if the
     effect of any such event in (i) or (ii), in your sole judgment, makes it
     impracticable or inadvisable to proceed with the offering, sale and
     delivery of the Notes on the terms and in the manner contemplated by the
     Prospectus.


                                       22
<Page>


          (c) Any notice of termination pursuant to this Section 11 shall be in
     writing.

          (d) If this Agreement shall be terminated pursuant to any of the
     provisions hereof (otherwise than pursuant to (i) notification by you as
     provided in Section 11(a) hereof or (ii) Section 9(b) or 11(b) hereof), or
     if the sale of the Notes provided for herein is not consummated because any
     condition to the obligations of the Underwriters and the Independent
     Underwriter set forth herein is not satisfied or because of any refusal,
     inability or failure on the part of the Company to perform any agreement
     herein or comply with any provision hereof, the Company will, subject to
     demand by you, reimburse the Underwriters and the Independent Underwriter
     for all reasonable out-of-pocket expenses (including the reasonable fees
     and expenses of their counsel), incurred by the Underwriters in connection
     herewith.

12.  NOTICES. All communications hereunder, except as may be otherwise
     specifically provided herein, shall be in writing, and:


          (a) if sent to any Underwriter or the Independent Underwriter, shall
     be mailed, delivered, or faxed and confirmed in writing, to such
     Underwriter c/o Bear, Stearns & Co. Inc., 383 Madison Avenue, New York,
     New York 10179, Attention: Lawrence Alletto, with a copy to Latham &
     Watkins LLP, 885 Third Avenue, New York, New York 10022, Attention:
     Robert A. Zuccaro, Esq.;

          (b) if sent to the Company, shall be mailed, delivered, or faxed and
     confirmed in writing to the Company and its counsel at the addresses set
     forth in the Registration Statement, Attention: Garry B. Watzke, Esq., with
     a copy to Sullivan & Worcester LLP, One Post Office Square, Boston,
     Massachusetts, 02111, Attention: William J. Curry, Esq.;

     PROVIDED, HOWEVER, that any notice to an Underwriter or the Independent
     Underwriter pursuant to Section 7 shall be delivered or sent by mail or
     facsimile transmission to such Underwriter or the Independent Underwriter
     at its address set forth in its acceptance facsimile to you, if any, which
     address will be supplied to any other party hereto by you upon request. Any
     such statements, requests, notices or agreements shall take effect at the
     time of receipt thereof.

13.  CONSENT TO JURISDICTION; WAIVER OF IMMUNITIES. EACH OF THE COMPANY AND THE
     GUARANTORS:

          (a) irrevocably submits to the jurisdiction of any New York State or
     federal court sitting in New York City and any appellate court from any
     court thereof in any action or proceeding arising out of or relating to
     this Agreement or any other document delivered hereunder;

          (b) irrevocably agrees that all claims in respect of any such action
     or proceeding may be heard and determined in such New York State court or
     in such federal court; and


                                       23
<Page>


          (c) irrevocably waives, to the fullest extent permitted by law, the
     defense of an inconvenient forum to the maintenance of such action or
     proceeding and irrevocably consents, to the fullest extent permitted by
     law, to service of process of any of the aforementioned courts in any such
     action or proceeding by the mailing of copies thereof by registered or
     certified mail, postage prepaid, to the Company or any of the Guarantors at
     its address as provided in Section 12(b) of this Agreement, such service to
     become effective five days after such mailing;

          (d) Except as set forth in subsections (a), (b) and (c) above, nothing
     in this Section 13 shall affect the right of any person to serve legal
     process in any other manner permitted by law or affect the right of any
     person to bring any action or proceeding against the Company or any
     Guarantor or their properties in the courts of other jurisdictions.

14.  PARTIES. This Agreement shall inure solely to the benefit of, and shall be
     binding upon, the Underwriters, the Independent Underwriter and the Company
     and the controlling persons, directors, officers, employees and agents
     referred to in Section 7 and 8, and their respective successors and
     assigns, and no other person shall have or be construed to have any legal
     or equitable right, remedy or claim under or in respect of or by virtue of
     this Agreement or any provision herein contained. The term "successors and
     assigns" shall not include a purchaser, in its capacity as such, of Notes
     from any of the Underwriters.

15.  GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
     ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, BUT WITHOUT REGARD TO
     PRINCIPLES OF CONFLICTS OF LAW.

16.  COUNTERPARTS. This Agreement may be executed in any number of counterparts,
     each of which shall be deemed to be an original, but all such counterparts
     shall together constitute one and the same instrument.

17.  HEADINGS. The headings herein are inserted for convenience of reference
     only and are not intended to be part of, or to affect the meaning or
     interpretation of, this Agreement.

18.  TIME IS OF THE ESSENCE. Time shall be of the essence of this Agreement. As
     used herein, the term "business day" shall mean any day when the
     Commission's office in Washington, D.C. is open for business.

19.  INDEPENDENT UNDERWRITER. (a) The Company hereby confirms its engagement
     of the services of the Independent Underwriter as, and the Independent
     Underwriter hereby confirms its agreement with the Company to render
     services as, a "qualified Independent Underwriter" within the meaning of
     Section (b)(15) of Rule 2720 with respect to the offering and sale of the
     Notes.

                                       24

<Page>


          (b) The Independent Underwriter hereby represents and warrants to, and
     agrees with, the Company and the Underwriters that with respect to the
     offering and sale of the Notes as described in the Prospectus:



               (i) The Independent Underwriter constitutes a "qualified
          Independent Underwriter" within the meaning of Section (b)(15) of Rule
          2720;

               (ii) The Independent Underwriter has participated in the
          preparation of the Registration Statement and the Prospectus and has
          exercised the usual standards of "due diligence" in respect thereto;

               (iii) The Independent Underwriter has undertaken the legal
          responsibilities and liabilities of an underwriter under the Act
          specifically including those inherent in Section 11 thereof;

               (iv) Based upon (A) a review of the Company, including an
          examination of the Registration Statement, information regarding the
          earnings, assets, capital structure and growth rate of the Company and
          other pertinent financial and statistical data, (B) inquiries of and
          conferences with the management of the Company and its counsel and
          independent public accountants regarding the business and operations
          of the Company, (C) consideration of the prospects for the industry in
          which the Company competes, estimates of the business potential of the
          Company, assessments of its management, the general condition of the
          securities markets, market prices of the capital stock and debt
          securities of, and financial and operating data concerning, companies
          believed by the Independent Underwriter to be comparable to the
          Company with debt securities of maturity and seniority similar to the
          Notes, and (D) such other studies, analyses and investigations as the
          Independent Underwriter has deemed appropriate, and assuming that the
          offering and sale of the Notes is made as contemplated herein and in
          the Prospectus, the Independent Underwriter recommends, as of the date
          of the execution and delivery of this Agreement, that the yield to
          worst on the Notes be not less than 7.06% (corresponding to an initial
          public offering price of the Notes of 96.5% of par, plus accrued
          interest, assuming a settlement on December 15, 2003), which minimum
          yield should in no way be considered or relied upon as an indication
          of the value of the Notes; and

               (v) Subject to the provisions of Section 6 hereof, the
          Independent Underwriter will furnish to the Underwriters on the
          Closing Date a letter, dated the Closing Date, in form and substance
          satisfactory to the Underwriters, to the effect of clauses (i) through
          (iv) above.

          (c) The Independent Underwriter hereby agrees with the Company and the
     Underwriters that, as part of its services hereunder, in the event of any
     amendment or supplement to the Prospectus, the Independent Underwriter will
     render services as a "qualified Independent Underwriter" within the meaning
     of Section (b)(15) of Rule 2720 with respect to the offering and sale of
     the Notes as described in the

                                       25
<Page>

     Prospectus as so amended or supplemented that are substantially the same as
     those services being rendered with respect to the offering and sale of the
     Notes as described in the Prospectus (including those described in
     subsection (b) above).

          (d) The Company, the Underwriters and the Independent Underwriter
     agree to comply in all material respects with all of the requirements of
     Rule 2720 applicable to them in connection with the offering and sale of
     the Notes. The Company agrees to cooperate with the Underwriters and the
     Independent Underwriter to enable the Underwriters to comply with Rule 2720
     and the Independent Underwriter to perform the services contemplated by
     this Agreement.

          (e) The Company and the Independent Underwriter agree that the
     Independent Underwriter will provide its services in its capacity as
     Independent Underwriter hereunder without compensation other than such
     compensation that the Independent Underwriter may receive as an Underwriter
     hereunder.

          (f) The Independent Underwriter hereby consents to the references to
     it as set forth under the caption "Underwriting" in the Prospectus and in
     any amendment or supplement thereto made in accordance with Section 4
     hereof.

                            [signature page follows]



                                       26

<Page>



     If the foregoing correctly sets forth the understanding between you and the
Company, please so indicate in the space provided below for that purpose,
whereupon this letter shall constitute a binding agreement among us. It is
understood that your acceptance of this letter on behalf of each of the
Underwriters is pursuant to the authority set forth in a form of Agreement among
Underwriters, the form of which shall be submitted to the Company for
examination, upon request, but without warranty on your part as to the authority
of the signers thereof.



                                    Very truly yours,

                                     IRON MOUNTAIN INCORPORATED



                                     By: /s/ C. Richard Reese
                                         ----------------------------------
                                         Name: C. Richard Reese
                                         Title: Chairman and Chief Executive
                                                Officer



                                    COMAC, INC.
                                    DATA SECURITY AND STORAGE, INC.
                                    DSI TECHNOLOGY ESCROW SERVICES, INC.
                                    IRON MOUNTAIN GLOBAL, INC.
                                    IRON MOUNTAIN INFORMATION MANAGEMENT, INC.
                                    MOUNTAIN REAL ESTATE ASSETS, INC.
                                    MOUNTAIN RESERVE II, INC.
                                    TREELINE SERVICES CORPORATION


                                    By:  /s/ C. Richard Reese
                                         ---------------------------------------
                                         Name: C. Richard Reese
                                         Title: Chairman and Chief Executive
                                                Officer





<Page>





                                    IRON MOUNTAIN GLOBAL, LLC

                                    By:  Iron Mountain Global, Inc., its sole
                                         member


                                    By:   /s/ C. Richard Reese
                                              ----------------------------------
                                          Name:
                                          Title:



                                    IRON MOUNTAIN BUSINESS TRUST #1

                                    By: /s/ C. Richard Reese
                                        ----------------------------------------
                                        Name:  C. Richard Reese
                                        Title: Trustee

                                    By: /s/ John F. Kenny, Jr.
                                        ----------------------------------------
                                        Name:  John F. Kenny, Jr.
                                        Title: Trustee

                                    By: /s/ Garry B. Watzke
                                        ----------------------------------------
                                        Name:  Garry B. Watzke
                                        Title: Trustee






<Page>



Accepted as of the date first above written

BEAR, STEARNS & CO. INC.



By: /s/ H.C. Charles Diao
    --------------------------------
    Name: H.C. Charles Diao
    Title: Senior Managing Director



J.P. MORGAN SECURITIES INC.



By: /s/ Michael K. Ryan
    --------------------------------
    Name: Michael K. Ryan
    Title: Vice President



LEHMAN BROTHERS INC.



By: /s/ Michael L. Carter
    --------------------------------
    Name: Michael L. Carter
    Title: Managing Director



BANC ONE CAPITAL MARKETS, INC.



By: /s/ Andrew J. McCarthy
    --------------------------------
    Name: Andrew J. McCarthy
    Title: Director



WILLIAM BLAIR & COMPANY, L.L.C.



By: /s/ James McKinney
    --------------------------------
    Name: James McKinney
    Title: Principal





<Page>



BNY CAPITAL MARKETS, INC.



By: /s/ Philip Benedict
    --------------------------------
    Name: Philip Benedict
    Title: Vice President



CIBC WORLD MARKETS CORP.



By: /s/ Brian S. Perman
    --------------------------------
    Name: Brian S. Perman
    Title: Managing Director



FLEET SECURITIES, INC.



By: /s/ Bradley Stewart
    --------------------------------
    Name: Bradley Stewart
    Title: Director



SCOTIA CAPITAL (USA) INC.



By: /s/ Greg Woynariki
    --------------------------------
    Name: Greg Woynariki
    Title: Managing Director



WACHOVIA SECURITIES, INC.



By: /s/ Rit Amin
    --------------------------------
    Name: Rit Amin
    Title: Vice President





<Page>



The foregoing Underwriting Agreement is hereby confirmed and accepted as of the
date first above written:

BEAR, STEARNS & CO. INC.
Acting as Independent Underwriter



By: /s/ H.C. Charles Diao
    --------------------------------
    Name: H.C. Charles Diao
    Title: Senior Managing Director

<Page>





                                   SCHEDULE I


<Table>
<Caption>

                                                        Aggregate Principal Amount    Aggregate Purchase Price
                                                        of Notes                      of Notes
Name of Underwriter                                     To be Purchased               to be Purchased
- -------------------                                     ---------------               ---------------
                                                                                

Bear, Stearns & Co. Inc.                                 $85,200,000                   $80,984,730
J.P. Morgan Securities Inc.                              $20,000,000                   $19,010,500
Lehman Brothers Inc.                                     $20,000,000                   $19,010,500
Banc One Capital Markets, Inc.                            $6,400,000                    $6,083,360
William Blair & Company, L.L.C.                           $6,400,000                    $6,083,360
BNY Capital Markets, Inc.                                 $6,400,000                    $6,083,360
CIBC World Markets Corp.                                  $6,400,000                    $6,083,360
Fleet Securities, Inc.                                    $6,400,000                    $6,083,360
Scotia Capital (USA) Inc.                                 $6,400,000                    $6,083,360
Wachovia Securities, Inc.                                 $6,400,000                    $6,083,360
                Total......................             =====================         ===================
                                                        $170,000,000                  $161,589,250


</Table>


                                      S-I-1

<Page>





                                   SCHEDULE II


                               LIST OF GUARANTORS



                                      NAME
                   Iron Mountain Information Management, Inc.
                   COMAC, Inc.
                   Iron Mountain Global, Inc.
                   Iron Mountain Global, LLC
                   DSI Technology Escrow Services, Inc.
                   Mountain Real Estate Assets, Inc.
                   Iron Mountain Business Trust #1
                   Data Security and Storage, Inc.
                   Mountain Reserve II, Inc.
                   Treeline Services Corporation


                                     S-II-1




<Page>




                                  SCHEDULE III


<Table>
<Caption>


                                                                                                     "B"S        IM US      IM US
                                                                                                    PERCENT     PERCENT    "NET" %
                                                                                                   OWNERSHIP   OWNERSHIP   OWNERSHIP
ENTITY NAME ("A")                                 OWNED BY ("B")                                    OF "A"       OF "B"     OF "A"
- -----------------                                 --------------                                   ---------   ---------   ---------
                                                                                                               

USA


Upper Providence Venture I, L.P.                  Iron Mountain Information Management, Inc.
                                                  (1% GP, 54% LP)                                   55.00%       100.00%      55.00%

LATIN/SOUTH AMERICA

H. Investments Ltd.                               Iron Mountain South America Limited              100.00%        50.10%      50.10%
Sistemas de Archivo
  Corporativo S.A. de R.L. de C.V.                Iron Mountain Mexico S.A. de R.L de C.V.          50.10%       100.00%      50.10%
Sistemas de Archivo S.A. de R.L. de C.V.          Sistemas de Archivo
                                                    Corporativo S.A. de R.L. de C.V.               100.00%        50.10%      50.10%
Sistemas de Archivo de Mexico S.A. de R.L.        Sistemas de Archivo
                                                    Corporativo S.A. de R.L. de C.V.               100.00%        50.10%      50.10%
Iron Mountain South America Limited               Iron Mountain Cayman Limited                      50.10%       100.00%      50.10%
IMSA Peru SRL                                     Iron Mountain South America Limited               99.88%        50.10%      50.05%
Iron Mountain Peru S.A.                           IMSA Peru SRL                                     99.96%        50.0399%    50.00%
Iron Mountain Chile S.A.                          Iron Mountain South America Limited               55.00%        50.10%      27.56%
Iron Mountain do Brasil
  Emprenedimentos Ltda.                           Iron Mountain South America Limited               99.90%        50.10%      50.05%
Iron Mountain Argentina S.A.                      Iron Mountain South America Limited               80.01%        50.10%      40.09%
Iron Mountain do Brasil S.A.                      Iron Mountain do Brasil Emprenedimentos Ltda.     70.00%        50.05%      34.33%
Almacenaje Y Administracion de Archives LTDA      Iron Mountain Chile S.A. (99.9%) and
                                                  Custodia de Documentos LTDA
                                                    de Archives LTDA ((0.1%)                       100.00%        50.10%      50.10%
Custodia de Documentos LTDA de Archives LTDA      Iron Mountain Chile S.A. (99.9%) and
                                                  Immobiliria E Inversiones
                                                    LA Primavera LTDA (0.1%)                       100.00%        50.10%      50.10%

Immobiliria E Inversiones LA Primavera LTDA       Iron Mountain Chile S.A. (99.9%) and
                  .                               Iron Mountain South America (0.1%)               100.00%        50.10%      50.10%
Movers & Files S.A                                H. Investments                                   100.00%        50.10%      50.10%

EUROPE

Iron Mountain Europe Limited                      Iron Mountain Group (Europe) Limited              50.10%       100.00%      50.10%
TM 1177 Ltd.                                      Iron Mountain Group (Europe) Limited             100.00%       100.00%     100.00%
Iron Mountain (UK) Limited                        Iron Mountain Europe Limited                     100.00%        50.10%      50.10%
Arcus Data Security, Limited                      Iron Mountain Europe Limited                     100.00%        50.10%      50.10%

</Table>

                                 Schedule III-1



<Page>
<Table>
<Caption>


                                                                                                     "B"S        IM US      IM US
                                                                                                    PERCENT     PERCENT    "NET" %
                                                                                                   OWNERSHIP   OWNERSHIP  OWNERSHIP
ENTITY NAME ("A")                                OWNED BY ("B")                                    OF "A"       OF "B"      OF "A"
- -----------------                                --------------                                   ---------   ---------   ---------
                                                                                                              

The Document Storage Company Limited             Iron Mountain Europe Limited                     100.00%        50.10%      50.10%
Iron Mountain Scotland (Holdings) Limited        Iron Mountain Europe Limited                     100.00%        50.10%      50.10%
Iron Mountain Scotland Limited                   Iron Mountain Scotland (Holdings) Limited
                                                   and JAD (93) Limited (28.2%)                     71.8%         50.10%     50.10%
Iron Mountain Ireland (Holdings) Ltd.            Iron Mountain Holdings (Europe) Limited          100.00%        50.10%      50.10%
Iron Mountain Ireland Ltd.                       Iron Mountain Ireland (Holdings) Ltd.            100.00%        50.10%      50.10%
Record Data Limited                              Iron Mountain Ireland Limited                    100.00%        50.10%      50.10%
Honanross Limited                                Record Data Limited                              100.00%        50.10%      50.10%
JAD 93 Limited                                   Iron Mountain Scotland  (Holdings) Limited       100.00%        50.10%      50.10%
Document and Information Management
 Services Limited                                Iron Mountain Europe Limited                     100.00%        50.10%      50.10%
Kestrel Data Services Limited                    Iron Mountain (UK) Limited                       100.00%        50.10%      50.10%
Miller Data Management Limited                   Iron Mountain (UK) Limited                       100.00%        50.10%      50.10%
Kestrel Data UK Limited                          Kestrel Data Services Limited                    100.00%        50.10%      50.10%
Britannia Data Management Ltd.                   Kestrel Data UK Limited                          100.00%        50.10%      50.10%
Kestrel Reprographics Limited                    Kestrel Data UK Limited                          100.00%        50.10%      50.10%
Datavault Limited                                Datavault Holdings Limited (65.97%,
                                                 Iron Mountain Europe Limited (28.12%),
                                                 Silver Sky Limited (5.9%)                        100.00%        50.10%      50.10%
Silver Sky Limited                               Iron Mountain Europe Limited                     100.00%        50.10%      50.10%
Datavault Holdings Limited                       Iron Mountain Europe Limited                     100.00%        50.10%      50.10%
Datavault Northwest Limited                      Datavault Limited                                100.00%        50.10%      50.10%
Datavault Southwest Limited                      Datavault Limited                                100.00%        50.10%      50.10%
Array Investments BV                             Iron Mountain (Holdings) Europe Limited          100.00%        50.10%      50.10%
Hays Informatiebeheer                            Array Investments BV                             100.00%        50.10%      50.10%
Iron Mountain Deutschland GmbH                   Iron Mountain Europe Limited                     100.00%        50.10%      50.10%
Hays Information Management Gmb H                Iron Mountain Deutschland GmbH                   100.00%        50.10%      50.10%
Archive Services Limited                         Iron Mountain (UK) Limited                       100.00%        50.10%      50.10%
Jones and Crossland Limited                      Archive Services Limited                         100.00%        50.10%      50.10%
Iron Mountain Holdings (Europe) Limited          Iron Mountain Europe Limited                     100.00%        50.10%      50.10%
Iron Mountain Holdings (France) SNC              Document and Information Management
                                                     Limited (99.9%) and
                                                 Miller Data Management Limited (0.1%)            100.00%        50.10%      50.10%
Iron Mountain (France) S.A.                      Iron Mountain Holdings (France) S.n.c.           100.00%        50.10%      50.10%
Archivage Actif Group
Iron Mountain SAS                                Iron Mountain (France) S.A.                      100.00%        50.10%      50.10%
</Table>

                                 Schedule III-2



<Page>
<Table>
<Caption>


                                                                                                    "B"S        IM US       IM US
                                                                                                   PERCENT     PERCENT     "NET" %
                                                                                                  OWNERSHIP   OWNERSHIP   OWNERSHIP
ENTITY NAME ("A")                                OWNED BY ("B")                                    OF "A"       OF "B"      OF "A"
- -----------------                                --------------                                   ---------   ---------   ---------
                                                                                                              



FIME S.A.                                        Iron Mountain (France) S.A.                      100.00%        50.10%      50.10%
Memogarde S.A.                                   FIME S.A.                                        100.00%        50.10%      50.10%
Societe Civile Immobiliere
 du Chemin Cornillon                             FIME S.A.                                        100.00%        50.10%      50.10%
Iron Mountain Espana S.A.                        Iron Mountain Holdings (Europe) Limited          100.00%        50.10%      50.10%
Hays Information Management Solutions AS         Iron Mountain Holdings (Europe) Limited          100.00%        50.10%      50.10%
TTN Geodata Services AS                          Hays Information Management Solutions AS         100.00%        50.10%      50.10%
Norsk Geodata Senter AS                          TTN Geodata Services AS                          100.00%        50.10%      50.10%
Iron Mountain Belgium NV                         Iron Mountain Holdings (Europe) Limited          100.00%        50.10%      50.10%
</Table>





                                 Schedule III-3

<Page>





                                     ANNEX I

                  FORM OF OPINION OF COMPANY'S OUTSIDE COUNSEL


1.   Each of the Guarantors (i) has been duly incorporated or formed, (ii) is
     validly existing as a corporation, limited liability company or
     Massachusetts statutory business trust, (iii) is in good standing under the
     laws of its jurisdiction of incorporation or formation and (iv) has the
     corporate, limited liability company or statutory business trust power and
     authority required to carry on its business as it is described in the
     Registration Statement and the Prospectus.

2.   The Company is duly qualified and is in good standing as a foreign
     corporation authorized to do business in each jurisdiction in which the
     nature of its business or its ownership or leasing of property requires
     such qualification, except where the failure to be so qualified would not
     have a material adverse effect on the Company and its subsidiaries, taken
     as a whole.

3.   All of the issued and outstanding shares of capital stock of, or other
     ownership interests in, each of the Guarantors have been duly and validly
     authorized and issued and are fully paid and non-assessable, and are, to
     our knowledge, owned beneficially by the Company or its subsidiaries, free
     and clear of any perfected security interest or adverse claim, except to
     the extent described in the Prospectus or as would not be material to the
     business, prospects, financial conditions or results of operations of the
     Company and its subsidiaries, taken as a whole.

4.   The Indenture has been duly authorized by all necessary corporate, limited
     liability company or statutory business trust, as the case may be, action
     of the Guarantors and, when the Notes are executed and authenticated in
     accordance with the provisions of the Indenture and delivered to the
     Underwriter against payment therefor as provided by the Underwriting
     Agreement, the Notes and the Guarantees will be entitled to the benefits of
     the Indenture, and will be valid and binding obligations of the Company and
     the Guarantors, respectively, enforceable in accordance with their terms.

5.   The Underwriting Agreement has been duly delivered by the Company and duly
     authorized, executed and delivered by the Guarantors.

6.   The Indenture has been duly delivered by the Company and duly authorized,
     executed and delivered by the Guarantors and is a valid and binding
     agreement of the Company and the Guarantors enforceable in accordance with
     its terms.

7.   The statements under the "Description of the Notes," "Material United
     States Federal Income Tax Considerations" and "Underwriting" in the
     Prospectus, as amended or supplemented through the date hereof, insofar as
     such statements constitute a summary of legal matters, documents or
     proceedings referred to therein, fairly present the information so
     summarized with respect to such legal matters, documents and proceedings.



                                   Annex I - 1

<Page>

8.   To our knowledge, no holder of any securities of the Company has the right
     to require registration of any security of the Company in connection with
     the filing of the Registration Statement or the issuance of the Notes.

9.   The execution, delivery and performance of the Underwriting Agreement, the
     Indenture and the Notes, the performance of the Guarantees, and compliance
     by the Company and the Guarantors with all the provisions thereof and the
     consummation of the transactions contemplated thereby do not require any
     consent, approval, authorization or other order of any court, regulatory
     body, administrative agency or other governmental body (or pursuant to any
     consent decree known to us by which the Company or a Guarantor is bound),
     and do not conflict with or constitute a breach of any of the terms or
     provisions of, or a default under, the charter or by-laws or comparable
     organizational documents of the Company or any of the Guarantors or any
     agreement filed as an exhibit to the Registration Statement, the Company's
     Annual Report on Form 10-K for the year ended December 31, 2002, including
     any amendments thereto (the "Annual Report"), the Company's Quarterly
     Reports on Form 10-Q for the quarters ended March 31, 2003, June 30, 2003
     and September 30, 2003, including any amendments thereto (collectively, the
     "Quarterly Reports") or any other agreement or other document known to us
     under which the Company or any of the Guarantors has outstanding
     indebtedness for money borrowed in excess of $4,000,000, or violate or
     conflict with any laws, administrative regulations or rulings or, to our
     knowledge, court decrees applicable to the Company, any of the Guarantors
     or their respective property.

10.  To our knowledge (A) no legal or governmental proceedings are pending or
     threatened to which the Company or any of the Guarantors is a party or to
     which any of their respective property is subject that are required to be
     described in the Prospectus and are not so described and (B) no contract or
     other document is required to be described in the Prospectus or filed as an
     exhibit to the Registration Statement that is not so described or filed.

11.  Neither the Company nor any Guarantor is now, nor immediately after the
     offering of the Notes as described in the Prospectus will be, an
     "investment company" or a company "controlled" by an "investment company"
     within the meaning of the Investment Company Act of 1940, as amended, or is
     or will be subject to registration under the Investment Company Act.

12.  The Registration Statement has become effective under the Act, and, to our
     knowledge, no stop order suspending the effectiveness of the Registration
     Statement is in effect and no proceedings for such purpose are pending
     before or threatened by the Commission. Any required filing of the
     Prospectus pursuant to Rule 424 under the Act has been made in accordance
     with said Rule 424. The Indenture has been duly qualified under the Trust
     Indenture Act.

13.  The Registration Statement and the Prospectus and any supplements or
     amendments thereto (except for (i) the financial statements and the notes
     thereto and the schedules and other financial data included or incorporated
     by reference therein, and (ii) the part of the Registration Statement that
     constitutes the Statement of Eligibility (Form

                                   Annex I - 2

<Page>

     T-1) of the Trustee under the Trust Indenture Act, as to which we express
     no opinion), as of their respective effective date or issue date, complied
     as to form in all material respects with the requirements of the Act.

14.  The Registration Statement, the Annual Report and each of the Quarterly
     Reports (except for the financial statements and the notes thereto and the
     schedules and other financial data included or incorporated by reference
     therein, as to which we express no opinion) complied as to form when filed
     with the Commission in all material respects with the requirements of the
     Exchange Act.

Such opinion shall also recite that:

In the course of the Company's preparation of the Registration Statement and the
Prospectus, we have participated in conferences with officers and other
representatives of the Company, counsel for the Underwriter, representatives of
the independent public accountants for the Company, and you, at which the
contents of the Registration Statement and Prospectus and related matters were
discussed and, although we are not passing upon, and do not assume
responsibility for, the factual accuracy, completeness or fairness of the
statements contained in the Registration Statement and Prospectus and have not
made any independent check or verification thereof (except as set forth in
paragraph 7), on the basis of the foregoing, we advise you that (except as to
(i) the financial statements, schedules and other financial data included in the
Registration Statement or the Prospectus, and (ii) that part of the Registration
Statement that constitutes the Statement of Eligibility (Form T-1) under the
Trust Indenture Act, as to which you have not asked us to express, and as to
which we do not express, any views) no facts have come to our attention that
would lead us to believe that (x) the Registration Statement (including the
Annual Report, the Quarterly Reports and the Incorporated Documents), as of the
time it became effective under the Act, as of March 21, 2003 at the time of
filing the Annual Report, or on the date hereof, contained or contains an untrue
statement of a material fact or omitted or omits to state a material fact
required to be stated therein or necessary in order to make the statements
therein not misleading or (y) the Prospectus (including the documents
incorporated by reference therein), at the time it was first provided to the
Underwriter for use in connection with the offering of the Notes or at the date
hereof, included or includes an untrue statement of a material fact or omitted
or omits to state a material fact necessary to make the statements therein, in
light of the circumstances under which they were made, not misleading.


                                   Annex I - 3

<Page>



                                    ANNEX II

                  FORM OF OPINION OF COMPANY'S GENERAL COUNSEL

1.   The statements under the captions "Executive Compensation" and "Certain
     Relationships and Related Transactions" in the Company's Proxy Statement
     for the annual meeting of shareholders held on May 22, 2003 incorporated by
     reference in the Company's Annual Report on Form 10-K, as amended by
     Amendment No. 1 on Form 10-K/A, for the year ended December 31, 2002 and
     incorporated by reference in the Prospectus, as amended or supplemented,
     insofar as such statements constitute a summary of legal matters, documents
     or proceedings referred to therein, fairly present the information called
     for with respect to such legal matters, documents and proceedings;

2.   The execution, delivery and performance of the Underwriting Agreement, the
     Indenture, the Notes and the Guarantees and compliance by the Company and
     the Guarantors with all the provisions thereof and the consummation of the
     transactions contemplated thereby do not require any consent, approval,
     authorization or other order of any court, regulatory body, administrative
     agency or other governmental body (except as such may be required under the
     securities or Blue Sky laws of the various states or jurisdictions outside
     the United States), and will not conflict with or constitute a breach of
     any of the terms or provisions of, or a default under, the charter or
     by-laws or comparable organizational documents of the Company or any of its
     subsidiaries or any agreement, indenture or other instrument to which it or
     any of its subsidiaries is a party or by which it or any of its
     subsidiaries or their respective property is bound, or violate or conflict
     with any laws, administrative regulations or rulings or court decrees
     applicable to the Company, any of its subsidiaries or their respective
     property;

3.   I do not know of (A) any legal or governmental proceeding pending or
     threatened to which the Company or any of its subsidiaries is a party or to
     which any of their respective property is subject which is required to be
     described in the Prospectus and is not so described, or (B) any contract or
     other document which is required to be described in the Prospectus or filed
     as an exhibit to the Registration Statement and is not so described or so
     filed;

4.   To my knowledge, neither the Company nor any of its subsidiaries is in
     violation of its respective charter or by-laws or comparable organizational
     documents and, to my knowledge, neither the Company nor any of its
     subsidiaries is in default in the performance of any obligation, agreement
     or condition contained in any bond, debenture, note or other evidence of
     indebtedness or in any other agreement, indenture or instrument material to
     the conduct of the business of the Company and its subsidiaries, taken as a
     whole, to which the Company or any of its subsidiaries is a party or by
     which it or any of its subsidiaries or their respective properties are
     bound;

5.   All leases to which the Company or any of its subsidiaries is a party
     relating to real property in Massachusetts or California are valid and
     binding and no default has occurred or is continuing thereunder which might
     result in any material adverse change in the business prospects, financial
     condition or results of operations of the Company and its


                                   Annex II - 1

<Page>

     subsidiaries taken as a whole, and the Company and its subsidiaries enjoy
     peaceful and undisturbed possession under all such leases to which any of
     them is a party as lessee with such exceptions as do not materially
     interfere with the use made thereof by the Company or such subsidiary; and

6.   To my knowledge, the Company and each of its subsidiaries has such permits,
     licenses, franchises and authorizations of governmental or regulatory
     authorities ("Permits"), including without limitation, under any applicable
     Environmental Laws, as are necessary to own, lease and operate its
     respective properties and to conduct its respective business in the manner
     described in the Prospectus; to my knowledge, the Company and each of its
     subsidiaries has fulfilled and performed all of its material obligations
     with respect to such Permits and no event has occurred which allows, or
     after notice or lapse of time would allow, revocation or termination
     thereof or would result in any other material impairment of the rights of
     the holder of any such Permit, except as in each case as would not, singly
     or in the aggregate, have a material adverse effect (financial or
     otherwise) on the Company and its subsidiaries, taken as a whole; and,
     except as described in the Prospectus, such Permits contain no restrictions
     that materially interfere with the business or operations of the Company or
     any of its subsidiaries as currently conducted.

Such opinion shall also recite that:

I assisted in collecting information requested by your counsel and outside
counsel to the Company and responded to inquiries concerning the Company and its
subsidiaries raised by such counsel, and I have reviewed the Registration
Statement and the Prospectus; although except as expressly set forth herein, I
am not passing upon, and do not assume any responsibility for, the accuracy,
completeness or fairness of the statements contained in the Registration
Statement and the Prospectus, no facts have come to my attention that would lead
me to believe that (except as to (i) financial statements, schedules and other
financial data contained therein and (ii) that part of the Registration
Statement that constitutes the Statement of Eligibility (Form T-1) under the
Trust Indenture Act, as to which I express no view), (x) the Registration
Statement (including the documents incorporated by reference therein), as of the
time it became effective under the Securities Act, as of March 21, 2003 at the
time of filing the Annual Report, or on the date hereof, contained or contains
an untrue statement of a material fact or omitted or omits to state a material
fact required to be stated therein or necessary in order to make the statements
therein not misleading or (y) the Prospectus (including the documents
incorporated by reference therein), at the time it was first provided to the
Underwriters for use in connection with the offering of the Notes or at the date
hereof, included or includes an untrue statement of a material fact or omitted
or omits to state a material fact necessary to make the statements therein, in
light of the circumstances under which they were made, not misleading.



                                   Annex II - 2

<Page>





                                    ANNEX III

         FORM OF OPINION OF SPECIAL PENNSYLVANIA COUNSEL TO THE COMPANY


1.   In reliance on the various certificates from the Commonwealth of
     Pennsylvania and a secretary's certificate from the Company, the Company is
     a corporation duly incorporated and validly subsisting under the laws of
     the Commonwealth of Pennsylvania and has the corporate power to own, lease
     and operate its properties and to conduct its business as described in the
     Prospectus, to execute, deliver and perform its obligations under the
     Underwriting Agreement and the Indenture and to consummate the transactions
     contemplated by the Underwriting Agreement and by the Prospectus.

2.   The Underwriting Agreement and the Indenture have been duly executed by the
     Company.

3.   The execution, delivery and performance of the Underwriting Agreement, the
     Indenture and the Note, and the consummation of the transactions
     contemplated therein, have been duly authorized by all necessary corporate
     action on the part of the Company and will not (i) violate the provisions
     of the Articles of Incorporation or Bylaws of the Company or (ii) violate
     any present statute, rule or regulation promulgated by the Commonwealth of
     Pennsylvania which in our experience is normally applicable both to general
     business corporations which are not engaged in regulated business
     activities and to transactions of the type contemplated by the Registration
     Statement, the Prospectus, the Indenture, the Note and the Underwriting
     Agreement (collectively, the "Law").

4.   The statements under the captions "Description of Our Capital Stock" and
     "Description of Certain Provisions of Pennsylvania Law and Our Articles of
     Incorporation and Bylaws" in the Prospectus and "Indemnification of
     Directors and Officers" in the Registration Statement have been reviewed by
     us, and insofar as such statements constitute summaries of certain
     provisions of the Articles of Incorporation or Bylaws of the Company,
     statutes, rules, regulations or statements of Law, they constitute fair
     summaries thereof.

5.   No consent or approval of, or notice to or filing with, any governmental
     authority or agency of the Commonwealth of Pennsylvania under any provision
     of applicable Law is required by the Company in connection with the
     execution and delivery of the Indenture or the issuance of the Note
     pursuant to the Indenture, or the offer and sale of the Note pursuant to
     the Underwriting Agreement, except those already obtained or made or those
     described in the Prospectus.

                                    Annex III - 1