EXHIBIT 5.2


                                                May 24, 2002


By Federal Express

Iron Mountain Incorporated
745 Atlantic Avenue
Boston, MA  02111

         Re: Registration Statement on Form S-8

Ladies and Gentlemen:

         We  have  acted  as  special  Pennsylvania  counsel  to  Iron  Mountain
Incorporated, a Pennsylvania corporation (the "Company"), in connection with the
registration  under the Securities  Act of 1933, as amended (the "Act"),  by the
Company of 1,352,543  shares (the "Shares") of its Common Stock,  par value $.01
per share,  that are issuable upon the exercise of options  granted  pursuant to
the  provisions of the Company's  2002 Stock  Incentive  Plan (the "Plan").  The
following  opinion  is  furnished  to you to be filed  with the  Securities  and
Exchange  Commission as Exhibit 5.2 to the Company's  registration  statement on
Form S-8 under the Act.

         In  rendering  our  opinion,  we have  examined  originals  or  copies,
certified  or otherwise  identified  to our  satisfaction,  of the Plan and such
other documents,  certificates and other  instruments and such matters of law as
in our judgment are necessary or  appropriate to enable us to render the opinion
expressed below. In giving this opinion, we are assuming the authenticity of all
instruments  presented to us as originals,  the conformity with the originals of
all instruments presented to us as copies and the genuineness of all signatures.

         We express no opinion herein as to the laws of any  jurisdiction  other
than the Commonwealth of  Pennsylvania,  and we express no opinion as to federal
and state  securities  or blue sky laws.  This opinion is limited to the matters
expressly  stated  herein.  No implied  opinion  may be  inferred to extend this
opinion  beyond the matters  expressly  stated  herein.  We do not  undertake to
advise  you or anyone  else of any  changes  in the  opinions  expressed  herein
resulting  from  changes  in law,  changes  in fact or any  other  matters  that
hereafter might occur or be brought to our attention.



Iron Mountain Incorporated
May 24, 2002
Page 2


         Based on and subject to the foregoing,  we are of the opinion that when
issued  and paid for in  accordance  with the terms of the Plan and the  options
granted  thereunder,   the  Shares  will  be  legally  issued,  fully  paid  and
non-assessable.

         We  consent  to  the  filing  of  this  opinion  as an  exhibit  to the
Registration Statement on Form S-8 being filed with respect to the Shares.

                                     Very truly yours,



                                     /s/ Ballard Spahr Andrews & Ingersoll, LLP