Exhibit 5.1




                              SULLIVAN & WORCESTER LLP
                               ONE POST OFFICE SQUARE
                             BOSTON, MASSACHUSETTS 02109
                                   (617) 338-2800
                                FAX NO. 617-338-2880
     IN WASHINGTON, D.C.                                   IN NEW YORK CITY
     1666 K STREET, N.W.                                   565 FIFTH AVENUE
   WASHINGTON, D.C. 20006                              NEW YORK, NEW YORK 10017
       (202) 775-8190                                       (212) 486-8200
    FAX NO. 202-293-2275                                 FAX NO. 212-758-2151





                                                              December 13, 2001


Iron Mountain Incorporated
745 Atlantic Avenue
Boston, Massachusetts 02111

         Re:      Iron Mountain Incorporated Registration Statement on Form S-3

Ladies and Gentlemen:

         We are  rendering  this  opinion  in  connection  with  a  registration
statement on Form S-3 (the  "Registration  Statement") to be filed today by Iron
Mountain  Incorporated,  a Pennsylvania  corporation (the "Company"),  and by IM
Capital Trust I, a statutory  business  trust formed under the laws of the State
of Delaware (the  "Trust"),  with the Securities  and Exchange  Commission  (the
"Commission")  under the  Securities  Act of 1933,  as amended (the  "Securities
Act"). The Registration Statement relates to the proposed issuance and sale from
time to time pursuant to Rule 415 under the  Securities  Act as set forth in the
final  prospectus  that  forms  a  part  of  the  Registration   Statement  (the
"Prospectus"),  and as to be set forth in one or more final  supplements  to the
Prospectus (each, a "Prospectus  Supplement") of up to $500,000,000 in aggregate
amount of the  following  securities  (the  "Registered  Securities"):  (i) debt
securities of the Company (the "Debt Securities"),  which may be guaranteed (the
"Subsidiary  Guarantees")  by certain  present and future wholly owned  domestic
subsidiaries  of the  Company  (the  "Subsidiary  Guarantors");  (ii)  shares of
preferred  stock,  $0.01 par value per share,  of the  Company  (the  "Preferred
Shares"); (iii) depositary shares representing fractional interests in Preferred
Shares (the "Depositary Shares"), evidenced by depositary receipts therefor (the
"Depositary Receipts");  (iv) shares of common stock, $0.01 par value per share,
of the Company (the "Common Shares");  (v) warrants to purchase Debt Securities,
Preferred  Shares,  Depositary  Shares or Common Shares (the  "Warrants");  (vi)
preferred securities of the Trust (the "Trust Preferred Securities");  (vii) the
Company's  guarantee  with  respect to the Trust  Preferred  Securities  (each a
"Trust  Guarantee"  and,  collectively,  the  "Trust  Guarantees");  (viii)  the
Company's stock purchase contracts (the "Stock Purchase  Contracts") to purchase
Common Shares at a future date; and (ix) the Company's stock purchase units (the
"Stock  Purchase  Units"),  consisting  of a Stock  Purchase  Contract  and Debt
Securities,  Trust  Preferred  Securities or debt  obligations  of third parties
securing the holders'  obligations to purchase the Common Shares under the Stock
Purchase Contract. The following opinion is furnished to the Company to be filed
with the  Commission as Exhibit 5.1 to the  Registration  Statement.  As used in
this

Iron Mountain Incorporated
December 13, 2001
Page 2

opinion, the term "Registration  Statement"  includes,  unless otherwise stated,
such  Registration   Statement,  as  amended  when  declared  effective  by  the
Commission (including any necessary post-effective amendments thereto); the term
"Convertible  Registered  Securities"  means  Registered  Securities  which  are
convertible   into,   exchangeable  for  or  exercisable  for  other  Registered
Securities, and the term "Underlying Registered Securities" means any Registered
Securities  which  are  issuable  upon  conversion,   exchange  or  exercise  of
Convertible Registered Securities.

         In  connection  with this  opinion,  we have examined and relied upon a
copy of the  Registration  Statement to be filed with the Commission on or about
the date hereof.  We have also  examined and relied upon  originals or copies of
such records, agreements and instruments of the Company,  certificates of public
officials  and of officers of the Company and such other  documents and records,
and such matters of law, as we have deemed necessary as a basis for the opinions
hereinafter  expressed.  In  making  such  examination,   we  have  assumed  the
genuineness  of all  signatures,  the legal  capacity  of natural  persons,  the
authenticity of all documents submitted to us as originals and the conformity to
the  originals of all documents  submitted to us as copies,  which facts we have
not independently verified.

         We have necessarily  assumed in connection with the opinions  expressed
below that the terms and conditions of the Registered Securities and any related
indentures,  agreements and  instruments,  except to the extent described in the
Registration Statement and the form of preliminary prospectus contained therein,
as originally  filed,  will be, and that any related  proceedings of the Company
conducted  after the date hereof will be conducted,  (i) in accordance  with all
applicable laws and the Company's Amended and Restated Articles of Incorporation
(the "Restated Articles") and Amended and Restated By-laws,  (ii) in the case of
the  Subsidiary  Guarantees,  in  accordance  with all  applicable  laws and the
Subsidiary  Guarantors' charters and by-laws, and (iii) not in conflict with any
contractual or other  restrictions  which are binding on the Company,  and that,
without limiting the generality of the foregoing,  any agreements or instruments
that  are  hereafter  required  to be filed as an  exhibit  to the  Registration
Statement will be properly  filed by an amendment  thereto or by the filing of a
Form 8-K by the Company under the  Securities  Exchange Act of 1934, as amended,
and  properly  incorporated  by  reference  in the  Registration  Statement,  as
permitted by the Securities Act and the rules and  regulations of the Commission
thereunder.

         We have  also  necessarily  assumed  in  connection  with the  opinions
expressed below that (i) the Registration Statement,  and any amendments thereto
(including  post-effective  amendments),  will have become  effective  under the
Securities  Act;  (ii) a  Prospectus  Supplement  will have been  filed with the
Commission  pursuant  to Rule  424  under  the  Securities  Act  describing  the
Registered  Securities  offered thereby;  (iii) the Company's Board of Directors
(the  "Board"),  and,  if  applicable,   the  Subsidiary  Guarantors'  Board  of
Directors,  or a duly authorized committee thereof shall have duly adopted final
resolutions (the "Final  Resolutions")  authorizing the issuance and sale of the
applicable  Registered  Security as contemplated by the Registration  Statement,
the  Prospectus,   the  applicable  Prospectus  Supplement  and  any  applicable
Principal Document (as defined below); (iv) evidence of each Registered Security
shall have been duly executed,  countersigned,  authenticated and registered, as
required by the  applicable  Principal

Iron Mountain Incorporated
December 13, 2001
Page 3


Document and Final Resolution for that Registered Security,  and shall have been
duly  delivered  to  the  purchasers  thereof  against  payment  of  the  agreed
consideration  therefor  (which shall, in any event, be an amount at least equal
to the par value, if any, thereof),  as provided in the Registration  Statement,
the Prospectus and the applicable Prospectus Supplement,  Principal Document and
Final Resolutions for such Registered  Security;  (v) all Registered  Securities
will be  issued  and  sold in  compliance  with  applicable  federal  and  state
securities laws and in the manner stated in the  Registration  Statement and the
applicable  Prospectus  Supplement;  (vi) any Underlying  Registered  Securities
being offered will be duly authorized, created and, if appropriate, reserved for
issuance upon such conversion,  exchange, redemption or exercise; and (vii) with
respect to any Common Shares or Preferred  Shares  offered,  or any  Convertible
Registered  Securities  as to which Common  Shares or  Preferred  Shares are the
related  Underlying  Registered  Securities  that,  at the time of the  issuance
thereof,  the  Company  will have a  sufficient  number of shares of  authorized
Common  Shares or  Preferred  Shares,  as the case may be,  under  the  Restated
Articles that will be unissued and not otherwise reserved for issuance.

         To the extent that the  obligations of the Company under each Indenture
or any Depositary  Agreement,  Warrant  Agreement,  Guarantee  Agreement,  Stock
Purchase  Contract  Agreement or Stock Purchase Unit Agreement  (each as defined
below and  collectively,  the "Principal  Documents") may be dependent upon such
matters,  we have assumed for  purposes of this  opinion that (i) each  Trustee,
Depositary,  Warrant Agent, Guarantee Trustee, Stock Purchase Contract Agent and
Stock  Purchase Unit Agent (each as defined  below) is duly  organized,  validly
existing  and  in  good  standing  under  the  laws  of  its   jurisdiction   of
organization, and is duly qualified to engage in the activities contemplated by,
and has the  requisite  organizational  and legal power and authority to perform
its obligations under, each Principal Document to which it is a party; (ii) each
Trustee,  Depositary,  Warrant Agent, Guarantee Trustee, Stock Purchase Contract
Agent and Stock  Purchase Unit Agent will be in compliance  with all  applicable
laws and  regulations,  with  respect to acting as a trustee or agent under each
applicable  Principal  Document;  and (iii) each Principal  Document will be the
valid and binding  agreements  of each party  thereto  (other than the Company),
enforceable against such parties in accordance with their respective terms.

         We express no opinion herein as to the laws of any  jurisdiction  other
than the laws of The Commonwealth of  Massachusetts  and the federal laws of the
United  States of America,  and we express no opinion as to state  securities or
blue sky laws.  Insofar as this opinion  involves matters of Pennsylvania law we
have,  with your  permission,  relied  solely on the  opinion of  Ballard  Spahr
Andrews & Ingersoll,  LLC dated December 13, 2001, a copy of which we understand
you are filing herewith as Exhibit 5.2 to the  Registration  Statement,  and our
opinion is subject to the exceptions,  qualifications  and  limitations  therein
expressed.

         Our  opinions  set forth below with  respect to the validity or binding
effect of any  security or  obligation  are subject to (i)  limitations  arising
under applicable bankruptcy, insolvency, reorganization,  fraudulent conveyance,
moratorium or other  similar laws  affecting  the  enforcement  generally of the
rights and  remedies of  creditors  and secured  parties or the  obligations  of
debtors;  (ii) general principles of equity (regardless of whether considered in
a proceeding at law or in equity), including, without limitation, the discretion
of any court of

Iron Mountain Incorporated
December 13, 2001
Page 4


competent  jurisdiction in granting specific  performance or injunctive or other
equitable relief;  and (iii) an implied duty on the part of the party seeking to
enforce  rights  or  remedies  to  take  action  and  make  determinations  on a
reasonable basis and in good faith to the extent required by applicable law.

         Based on and subject to the foregoing,  and subject to the assumptions,
limitations and  qualifications set forth herein, we are of the opinion that, as
of the date hereof:

                  1.  Each  series  of  Debt   Securities   and  the  Subsidiary
         Guarantees,  if any, will be validly issued and binding  obligations of
         the Company and the Subsidiary Guarantors when (i) the indentures filed
         as Exhibits 4.1 and 4.2 to the  Registration  Statement,  including any
         necessary supplemental indenture, or any other indenture, including any
         necessary  supplemental  indenture thereto,  filed as an exhibit to the
         Registration  Statement,  as the case may be (the applicable indenture,
         as so  filed  and  supplemented,  the  "Indenture"),  shall  have  been
         qualified under the Trust  Indenture Act of 1939, as amended;  and (ii)
         the Indenture shall have been duly  authorized,  executed and delivered
         by the Company and a trustee named thereunder (the "Trustee").  If such
         Debt Securities are Underlying Registered  Securities,  the opinion set
         forth in this  paragraph is subject to the further  condition  that the
         Convertible Registered Securities relating to such Debt Securities,  at
         the time of the issuance or delivery thereof, as applicable, and of the
         conversion,  exchange or exercise  thereof,  are validly issued,  fully
         paid  and  non-assessable  by the  Company  or are  valid  and  binding
         obligations of the Company, as applicable.

                  2. Each series of  Preferred  Shares  will be validly  issued,
         fully paid and  non-assessable  by the Company  when (i) the Board or a
         duly authorized  committee thereof shall have duly adopted  resolutions
         approving a Statement with Respect to Shares setting forth the terms of
         such series of Preferred  Shares,  including  establishing a sufficient
         quantity  thereof  and  setting  forth the  preferences,  restrictions,
         limitations as to dividends, qualifications and terms and conditions of
         redemption,  consistent  with the Final  Resolutions for such series of
         Preferred  Shares;  and (ii) the Statement with Respect to Shares shall
         have been duly  executed  and filed with and accepted for record by the
         Department  of  State  of the  Commonwealth  of  Pennsylvania.  If such
         Preferred Shares are Underlying Registered Securities,  the opinion set
         forth in this  paragraph is subject to the further  condition  that the
         Convertible Registered Securities relating to such Preferred Shares, at
         the time of the issuance or delivery thereof, as applicable, and of the
         conversion,  exchange or exercise  thereof,  are validly issued,  fully
         paid  and  non-assessable  by the  Company  or are  valid  and  binding
         obligations of the Company, as applicable.

                  3. The Depositary  Shares will be validly  issued,  fully paid
         and  non-assessable by the Company and the Depositary  Receipts will be
         validly  issued  and will  entitle  the  holders  thereof to the rights
         specified therein and in the applicable Depositary Agreement,  when (i)
         the  conditions  set forth in  paragraph  2 above  with  respect to the
         related  Preferred  Shares are met; (ii) the Board or a duly authorized
         committee thereof shall have duly adopted resolutions  approving one or
         more depositary agreements,  including a form of Depositary Receipt set
         forth therein or related  thereto  (each,  a

Iron Mountain Incorporated
December 13, 2001
Page 5


         "Depositary  Agreement"),  relating to such Depositary Shares,  between
         the  Company  and  a  financial   institution   identified  therein  as
         depositary  (each, a  "Depositary");  (iii) the  applicable  Depositary
         Agreement  shall have been duly  executed and  delivered by the Company
         and the Depositary;  and (iv) the related  Preferred  Shares shall have
         been duly deposited with the Depositary under the Depositary Agreement.

                  4. The Common  Shares will be validly  issued,  fully paid and
         non-assessable  by the Company.  If such Common  Shares are  Underlying
         Registered  Securities,  the  opinion  set forth in this  paragraph  is
         subject to the condition  that the  Convertible  Registered  Securities
         relating to such Common Shares, at the time of the issuance or delivery
         thereof,  as applicable,  and of the  conversion,  exchange or exercise
         thereof,  are  validly  issued,  fully paid and  non-assessable  by the
         Company  or are  valid  and  binding  obligations  of the  Company,  as
         applicable.

                  5. The Warrants will be duly authorized and validly issued and
         binding  obligations  of the  Company  when  (i)  the  Board  or a duly
         authorized  committee  thereof  shall  have  duly  adopted  resolutions
         approving one or more warrant  agreements,  including a form of warrant
         set forth therein or related  thereto  (each,  a "Warrant  Agreement"),
         establishing  the terms and  conditions of such  Warrants,  between the
         Company and a financial institution identified therein as warrant agent
         (each, a "Warrant  Agent");  and (ii) the applicable  Warrant Agreement
         shall have been duly  executed  and  delivered  by the  Company and the
         Warrant Agent. If such Warrants are Underlying  Registered  Securities,
         the  opinion  set forth in this  paragraph  is subject  to the  further
         condition that the Convertible  Registered  Securities relating to such
         Warrants,  at  the  time  of  the  issuance  or  delivery  thereof,  as
         applicable,  and of the conversion,  exchange or exercise thereof,  are
         validly  issued,  fully paid and  non-assessable  by the Company or are
         valid and binding obligations of the Company, as applicable.

                  6. The Trust  Guarantees  will be duly  authorized and validly
         issued and binding  obligations  of the Company when (i) the Board or a
         duly authorized  committee thereof shall have duly adopted  resolutions
         approving one or more guarantee  agreements,  ("Guarantee  Agreement"),
         establishing the terms and conditions of such Trust Guarantees, between
         the Company and a financial institution identified therein as guarantee
         trustee  ("Guarantee  Trustee");  and  (ii)  the  applicable  Guarantee
         Agreement  shall have been duly  executed and  delivered by the Company
         and the Guarantee Trustee.

                  7. The Stock Purchase  Contracts  will be duly  authorized and
         validly  issued and binding  obligations  of the  Company  when (i) the
         Board or a duly  authorized  committee  thereof shall have duly adopted
         resolutions  approving one or more stock purchase  agreements,  ("Stock
         Purchase Contract Agreement"), establishing the terms and conditions of
         such Stock  Purchase  Contract,  between  the  Company  and a financial
         institution identified therein as stock purchase contract agent ("Stock
         Purchase  Contract  Agent");  and (ii) the  applicable  Stock  Purchase
         Contract  Agreement  shall have been duly executed and delivered by the
         Company and the Stock Purchase Contract Agent.

Iron Mountain Incorporated
December 13, 2001
Page 6


                  8.  The  Stock  Purchase  Units  will be duly  authorized  and
         validly  issued and binding  obligations  of the  Company  when (i) the
         Board or a duly  authorized  committee  thereof shall have duly adopted
         resolutions  approving one or more stock  purchase  agreements  ("Stock
         Purchase  Unit   Agreement")   covering  the  Stock   Purchase   Units,
         establishing  the terms and  conditions of such Stock  Purchase  Units,
         between the Company and a financial  institution  identified therein as
         stock purchase unit agent ("Stock  Purchase Unit Agent");  and (ii) the
         Stock Purchase Agreement shall have been duly executed and delivered by
         the Company and the Stock Purchase Unit Agent.

         All of the  opinions  set  forth  herein  are  rendered  as of the date
hereof, and we assume no obligation to update such opinions to reflect any facts
or circumstances which may hereafter come to our attention or any changes in the
law which may hereafter occur.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement  and to the  reference  to our  firm  in the  Prospectus
forming a part of the Registration  Statement. In giving such consent, we do not
thereby  admit that we come  within the  category  of persons  whose  consent is
required  under  Section  7 of  the  Securities  Act  or  under  the  rules  and
regulations of the Commission promulgated thereunder.

                                                 Very truly yours,



                                                 /s/ SULLIVAN & WORCESTER LLP
                                                 SULLIVAN & WORCESTER LLP