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                                                                    EXHIBIT 99.2

                           CERTIFICATION PURSUANT TO
                18 U.S.C. SECTION. 1350, AS ADOPTED PURSUANT TO
                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

    In connection with the filing of the Quarterly Report on Form 10-Q for the
fiscal quarter ended June 30, 2002 (the "Report") by Iron Mountain Incorporated
(the "Company"), the undersigned, as the Chief Financial Officer of the Company,
hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that:

    - the Report fully complies with the requirements of Section 13(a) or
      Section 15(d) of the Securities Exchange Act of 1934; and

    - the information contained in the Report fairly presents, in all material
      respects, the financial condition and results of operations of the
      Company.

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                                                       /s/ JOHN F. KENNY, JR.
                                                       ---------------------------------------------
                                                       Name: John F. Kenny, Jr.
                                                       Title: Chief Financial Officer
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