FOR IMMEDIATE RELEASE:

Contact: John F. Kenny, Jr.
         Executive Vice President and
         Chief Financial Officer
         (617) 535-4799

          IRON MOUNTAIN INCORPORATED ANNOUNCES TENDER OFFER AND CONSENT
           SOLICITATION FOR 10-1/8% SENIOR SUBORDINATED NOTES DUE 2006

BOSTON, MA--September 4, 2001--Iron Mountain Incorporated (NYSE: IRM), the
leader in records and information management services, announced today that it
will commence a cash tender offer and consent solicitation on Wednesday,
September 5, 2001 for all of the $165 million aggregate principal amount
outstanding of its 10-1/8% Senior Subordinated Notes due 2006 (the "notes"). In
conjunction with the tender offer, noteholder consents are being solicited to
effect certain amendments to the indenture governing the notes.

The tender offer will expire at 12:00 midnight, New York City time, on Tuesday,
October 2, 2001, unless extended or earlier terminated (the "Expiration Date").
The consent solicitation will expire at 5:00 p.m., New York City time, on
Tuesday, September 18, 2001, unless extended or earlier terminated (the "Consent
Date"). Holders tendering their notes will be required to consent to certain
proposed amendments to the indenture governing the notes, which will eliminate
certain covenants. Holders may not tender their notes without delivering
consents or deliver consents without tendering their notes.

Holders who provide consents to the proposed amendments will receive a consent
payment of $30 per $1,000 principal amount of notes tendered and accepted for
purchase if they provide their consents on or prior to the Consent Date. The
total consideration to be paid for each validly tendered note and delivered
consent will be the greater of (i) $1,052.40 and (ii) a price based on a fixed
spread of 50 basis points over the yield to maturity on the applicable reference
U.S. Treasury Note. The consent payment is included in the foregoing calculation
of total consideration. The yield to maturity of the reference U.S. Treasury
Note used in the fixed spread formula will be set at 2:00 p.m., New York City
time, on the Consent Date. Iron Mountain expects to pay the total consideration
promptly after the Consent Date for notes validly tendered on or prior to the
Consent Date and accepted for purchase.

Holders who validly tender their notes after the Consent Date and prior to the
Expiration Date are not entitled to the consent payment, and will receive as
payment for their notes the total consideration minus the consent payment. Iron
Mountain expects to make payment on notes validly tendered after the Consent
Date and prior to the Expiration Date and accepted for purchase promptly after
the Expiration Date. Holders who validly tender their notes will also be paid
accrued and unpaid interest up to, but not including, the applicable payment
date for their notes.

                                    --more--



IRON MOUNTAIN INCORPORATED COMMENCES TENDER OFFER / PAGE 2

Iron Mountain intends to finance the tender offer and consent solicitation with
a portion of the net proceeds from its proposed offering of $180 million in
aggregate principal amount of Senior Subordinated Notes due 2013, which was
announced separately today. The completion of this financing is one of the
conditions to Iron Mountain's obligations to accept notes for payment pursuant
to the tender offer and consent solicitation. The terms and conditions of the
tender offer and consent solicitation, including Iron Mountain's obligation to
accept the notes tendered and pay the purchase price and consent payments, will
be set forth in Iron Mountain's Offer to Purchase and Consent Solicitation
Statement, dated September 5, 2001. Iron Mountain may amend, extend or, subject
to certain conditions, terminate the tender offer and consent solicitation.

Iron Mountain has retained Bear, Stearns & Co. Inc. to act as the exclusive
Dealer Manager and Solicitation Agent in connection with the tender offer and
consent solicitation. Requests for documents may be directed to D.F. King & Co.,
Inc., the Information Agent at (800) 735-3107. Questions regarding the tender
offer and consent solicitation may be directed to Bear, Stearns & Co. Inc. at
(877) 696-2327.

This announcement shall not constitute an offer to purchase, a solicitation of
an offer to purchase or a solicitation of consents with respect to any
securities. The tender offer and consent solicitation is being made solely by
the Offer to Purchase and Consent Solicitation Statement, dated September 5,
2001.

Iron Mountain Incorporated is the global leader in records and information
management services. Iron Mountain currently provides services to over 125,000
customer accounts, including more than half of the Fortune 500, in 77 markets in
the United States and 44 markets outside of the United States. The Company
operates over 625 records management facilities in North America, Europe and
Latin America.



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