EXHIBIT 5
                                                                      ---------

                                                                 CONFORMED COPY
                                                                 --------------


                      [Sullivan & Worcester LLP Letterhead]




                                                              December 8, 1997




Iron Mountain Incorporated
745 Atlantic Avenue
Boston, Massachusetts  02111

Re:   Registration Statement on Form S-4
      $250,000,000 of Senior Subordinated Notes due 2009

Ladies and Gentlemen:

         The following opinion is furnished to you in connection with the
registration pursuant to a registration statement on Form S-4 (the "Registration
Statement") under the Securities Act of 1933, as amended (the "Securities Act"),
by Iron Mountain Incorporated, a Delaware corporation (the "Company"), of
$250,000,000 of Senior Subordinated Notes due 2009 (the "Notes"), which Notes
will initially be guaranteed (the "Guarantees") by each of the Company's direct
and indirect wholly owned subsidiaries (collectively, the "Subsidiary
Guarantors") and issued under an indenture relating to the Notes (the
"Indenture") by and among the Company, the Subsidiary Guarantors and The Bank of
New York, as Trustee (the "Trustee").

         We have acted as counsel to the Company in connection with the
preparation of the Registration Statement, and we have examined originals or
copies, certified or otherwise identified to our satisfaction, of corporate
records, certificates and statements of officers and accountants of the Company,
of public officials, and such other documents as we have considered necessary in
order to furnish the opinion hereinafter set forth. We express no opinion herein
as to any laws other than the State of New York.

         Based upon and subject to the foregoing, we are of the opinion that the
Company and the Subsidiary Guarantors have taken all necessary action to approve
the Indenture and the terms of the Notes and Guarantees, and when (i) the
Registration Statement has become effective under the Securities Act, (ii) the
Indenture has been duly executed and delivered by the Company, the Subsidiary
Guarantors and the Trustee, and the Notes have been duly executed by the Company
and authenticated by the Trustee, (iii) the Indenture has been qualified under
the Trust Indenture Act of 1939, as amended, and (iv) the Notes have been
delivered to the purchasers thereof against payment of the purchase price
therefore as described in the Registration Statement, the Notes and the
Guarantees will be legal, valid and binding obligations of the Company and the
Subsidiary Guarantors respectively, subject in each case to the effect of (a)
bankruptcy, insolvency, reorganization, moratorium or other similar laws
relating to or affecting the rights and remedies of creditors and the
obligations of debtors generally and (b) the application of general principles
of equity (regardless of whether enforcement is considered in proceedings at law
or in equity).

         We express no opinion as to the applicability (and, if applicable, the
effect) of Section 548 of the United States Bankruptcy Code or any comparable
provision of state law to the conclusions expressed above.





Iron Mountain Incorporated
December 8, 1997
Page 2


         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to our firm made therein under the
caption "Legal Matters." 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 the Rules and Regulations of the Securities and Exchange
Commission promulgated thereunder.

                                      Very truly yours,



                                      /s/ Sullivan & Worcester LLP
                                      ----------------------------

                                     SULLIVAN & WORCESTER LLP