[LOGO OF IRON MOUNTAIN]

Investor Relations Contact:
Stephen P. Golden
Vice President, Investor Relations
sgolden@ironmountain.com
(617) 535-2994

FOR IMMEDIATE RELEASE

           Iron Mountain Reports Third Quarter 2008 Financial Results

     o    Q3 revenue up 12%  year-over-year  driven by solid 8% internal  growth
          and balanced performance across business segments

     o    OIBDA (excluding asset gains and losses) increases 14%  year-over-year
          on revenue growth, gross margin gains and disciplined cost management;
          operating income increases to $136 million

     o    Significant  strengthening of U.S. Dollar drives $16 million, non-cash
          charge and higher tax provision

     o    Revisions made to full year 2008 guidance to reflect projected impacts
          from recent changes in foreign currency exchange rates

BOSTON - October 30, 2008 - Iron Mountain  Incorporated  (NYSE: IRM), the global
leader in  information  protection  and storage  services,  today  announced its
financial  results for the quarter ended  September 30, 2008,  reporting  strong
revenue and operating income before depreciation and amortization (OIBDA) growth
and earnings of $0.06 per diluted share.

Iron Mountain  posted strong  year-over-year  revenue growth of 12% in the third
quarter  supported  by  internal  growth of 8%,  with  acquisitions  and foreign
currency rate changes contributing approximately 4% to total growth. The Company
drove solid  revenue  gains across its North  American  Physical,  International
Physical and Worldwide  Digital  business  segments.  Total  revenue  growth was
highlighted by continued strength in service revenue growth, supported by strong
overall  performance  in the North  American  physical  business.  OIBDA of $211
million for the quarter exceeded the Company's  forecasted range driven by a 14%
year-over-year  increase in gross profit,  reflecting  strong  revenue gains and
continued improvements in gross margins.

"While  considerable  volatility in foreign  exchange rates impacts our reported
results,  our  underlying  operational  performance  and outlook  remain strong,
reflecting  the resiliency of our business  model," said Bob Brennan,  President
and CEO.  "We are pleased with our strong third  quarter  operating  results and
continued solid business performance.  These results reflect solid growth across
our segments,  driven by our team's focus on disciplined  execution in servicing
our customers.  We also continue to exercise financial discipline in the current
environment, maintaining strong liquidity and financing capacity."

Net income for the  quarter of $11  million,  or $0.06 per  diluted  share,  was
impacted by the  significant  strengthening  of the U.S. dollar since the end of
the second quarter of 2008.  Declines of  approximately 9% in currencies such as
the  British  pound  sterling  and the Euro  versus the U.S.  dollar  during the
quarter resulted in a net $16 million  non-cash charge in other expense,  net as
the Company marked its U.S. dollar denominated third party and intercompany debt
to market.  The net $16 million expense  includes  offsetting  foreign  currency
gains and  losses,  which are  incurred in  different  tax  jurisdictions.  As a
result,  the  Company  recorded  an  additional  $20  million  of  non-cash  tax
provision.  For the quarter,  these non-cash charges impacted  earnings by $0.17
per diluted share and raised the effective tax rate to 81.6%.

                                    --more--



Iron Mountain Reports Third Quarter 2008 Financial Results / Page 2

Key Financial Highlights - Q3 2008

Iron Mountain's  total  consolidated  revenues for the quarter grew 12% over the
prior year  period to $784  million  driven by solid  internal  growth of 8% and
augmented by several  acquisitions  completed in 2007, most notably ArchivesOne,
Inc., RMS Services - USA, Inc. and Stratify,  Inc. Storage internal growth of 8%
was as expected.  Core service  internal  revenue growth of 13% was supported by
continued  strength in shredding  services,  strong  performance in the physical
data protection  business and increased fuel surcharges.  Complementary  service
revenue internal growth was modest, as expected, due primarily to the completion
of large special projects in Europe and some softness in the more  discretionary
revenues such as fulfillment services and software license sales. See Appendix A
at the end of this press release for a presentation of Selected Financial Data.

The  Company  posted a 14%  increase in gross  profits  for the  quarter  driven
primarily by strong revenue  growth.  Gross profit margin improved from 54.0% in
the third  quarter of 2007 to 55.1% in the third quarter of 2008 due to improved
storage gross  margins in North  America,  Latin  America and Asia Pacific,  and
increased service margins,  supported in part by higher recycled paper revenues.
These benefits more than offset the impact of the shift in revenue mix, as labor
and  transportation  intensive  services  such as secure  shredding and Document
Management Solutions (DMS) grew faster than storage.

OIBDA for the  quarter  grew 10% over the  prior  year  period to $211  million,
reflecting the Company's  revenue  performance and gross margin gains.  Selling,
general and administrative costs increased 14% in the quarter, slightly ahead of
revenue gains,  reflecting  impacts from the integration of recent  acquisitions
and  increased   investments  in  security,   new  products  and  infrastructure
enhancements  initiated in 2007. The impacts of these  investments  moderated in
the third  quarter and are expected to moderate  further in the fourth  quarter.
See Appendix B at the end of this press  release for a  discussion  of OIBDA and
the required reconciliation to the appropriate GAAP measures.

Operating income for the third quarter of 2008 was $136 million,  up 6% compared
to the same period in 2007,  as OIBDA gains were  partially  offset by increased
depreciation  and  amortization  expense,  driven  primarily by higher levels of
capital  expenditures in 2007 and  acquisitions.  Net income for the quarter was
$11 million,  or $0.06 per diluted share,  including  other expense,  net of $16
million,  driven by foreign currency rate fluctuations.  The components of other
expense, net, are detailed in the table below.

The  Company's  effective  tax rate for the  quarter  before  the  impact of any
foreign currency rate  fluctuations  and other discrete items was  approximately
40%,  which is higher  than the  expected  rate of 38% due to an increase in the
estimate  of  disallowed   interest   expense   deductions  at  certain  foreign
subsidiaries.  The net tax impact of the foreign  currency rate  fluctuations as
described  above added  approximately  42% to the effective  rate.  Based on the
current view of its 2008  projected  tax position,  the Company  expects its tax
rate  before the impact of any  foreign  currency  rate  fluctuations  and other
discrete items for 2008 to be  approximately  39%.  Included in the 39% rate for
2008 is  approximately 2% resulting from the unbenefited net operating losses of
certain start-up entities. Beyond 2008, we expect our tax rate before the impact
of any foreign  currency rate  fluctuations and other discrete items to decrease
over time by approximately 2%.

The Company's Free Cash Flow before  Acquisitions and Discretionary  Investments
for the nine months ended September 30, 2008 was $86 million.  Higher cash flows
from operating activities compared to the comparable prior year period were more
than  offset by  increased  capital  expenditures  as the  higher  2007 year end
accrual  reversed into the first  quarter of 2008.  See Appendix B at the end of
this press  release for a discussion of FCF and the required  reconciliation  to
the appropriate GAAP measures.

                                    --more--



Iron Mountain Reports Third Quarter 2008 Financial Results / Page 3

Acquisitions

Iron Mountain's  acquisition strategy focuses on acquiring attractive businesses
that provide a strong  platform for future  growth by  expanding  the  Company's
geographic   footprint  and  service  offerings  while  enhancing  its  existing
operations.  Since the end of the second  quarter,  the  Company  completed  the
previously announced acquisition of a DMS business in France.

Financial Performance Outlook

Iron  Mountain is refining its financial  performance  outlook for the full year
ending  December 31, 2008.  This guidance is based on current  expectations  and
does not include the potential impact of any future  acquisitions.  For the full
year,  the Company is now  targeting  11%-12%  revenue  growth and 11%-13% OIBDA
growth  (excluding  gains and  losses  from  asset  disposals/write-offs).  This
performance is consistent with its long-term financial goals.  Reductions in the
company's  full year revenue and OIBDA  guidance  are driven by the  significant
strengthening  of the U.S.  dollar  against the major  currencies,  which lowers
results reported in US dollars.  The Company's outlook for the fourth quarter of
2008 set forth below  includes a reduction of about 5% in both revenue and OIBDA
driven by the  strengthening  U.S. dollar,  which more than offset the impact of
higher than expected performance in the third quarter. Also included in the full
year outlook is the $5 million loss on asset  write-offs  reported  year-to-date
2008 plus the $2 million  write-off  associated  with  planned real estate moves
expected  to be recorded in the quarter  ending  December  31, 2008  (dollars in
millions):



                                       Full Year Ending December 31, 2008
                               ------------------------------------------------------
                                 Quarter Ending
                               December 31, 2008     Previous       Current
                               ----------------  ---------------- -----------------
                                 Low    High     Low      High     Low      High
                               ----------------  ---------------- -----------------
                                                          
Revenues                       $  732  $  762    $ 3,050  $ 3,090  $ 3,035  $ 3,065
Operating Income                  106     121        478      498      473      488
Depreciation & Amortization           ~78                ~295            ~295

Capital Expenditures                                     ~440            ~430
Internal Revenue Growth                               7%       9%       7%       9%


Iron  Mountain's  conference  call to discuss its third  quarter 2008  financial
results and third  quarter and full year 2008 outlook will be held today at 8:30
a.m.  Eastern  Time.  In order to further  enhance  the  overall  quality of its
investor  communications,  the Company will simulcast the conference call on its
Web  site at  www.ironmountain.com,  the  content  of  which is not part of this
earnings  release.  A  slide   presentation   providing  summary  financial  and
statistical  information that will be discussed on the conference call will also
be  posted  to the Web site and  available  for  real-time  viewing.  The  slide
presentation  and replays of the  conference  call will be  available on the Web
site for future reference.

About Iron Mountain

Iron  Mountain  Incorporated  (NYSE:IRM)  helps  organizations  around the world
reduce the costs and risks associated with  information  protection and storage.
The  Company  offers  comprehensive   records  management  and  data  protection
solutions,   along  with  the  expertise  and  experience  to  address   complex
information  challenges  such as rising  storage costs,  litigation,  regulatory
compliance and disaster  recovery.  Founded in 1951,  Iron Mountain is a trusted
partner to more than 120,000 corporate clients throughout North America, Europe,
Latin America and Asia Pacific.  For more  information,  visit the Company's Web
site at www.ironmountain.com.

                                    --more--




Iron Mountain Reports Third Quarter 2008 Financial Results / Page 4

Forward Looking Statements

This  press  release  contains  certain  forward-looking  statements  within the
meaning of the  Private  Securities  Litigation  Reform Act of 1995 and  federal
securities  laws,  and is  subject  to the  safe-harbor  created  by  such  Act.
Forward-looking  statements include our 2008 financial  performance  outlook and
statements regarding our goals, beliefs, future growth strategies,  investments,
objectives,  plans and current expectations.  These statements involve known and
unknown risks, uncertainties and other factors that may cause the actual results
to be  materially  different  from  those  contemplated  in the  forward-looking
statements. Such factors include, but are not limited to: (i) the cost to comply
with current and future  legislation,  regulations and customer demands relating
to privacy  issues;  (ii) the impact of litigation  that may arise in connection
with incidents in which we fail to protect the Company's customers' information;
(iii)  changes in the price for the Company's  services  relative to the cost of
providing such services; (iv) changes in customer preferences and demand for the
Company's  services;  (v) in the various digital businesses in which the Company
is  engaged,  the cost of capital  and  technical  requirements,  demand for the
Company's  services or competition for customers;  (vi) the Company's ability or
inability  to  complete  acquisitions  on  satisfactory  terms and to  integrate
acquired  companies  efficiently;   (vii)  the  cost  or  potential  liabilities
associated  with real estate  necessary for the Company's  business;  (viii) the
performance  of business  partners  upon whom the Company  depends for technical
assistance or management and  acquisition  expertise  outside the United States;
(ix) changes in the  political  and economic  environments  in the  countries in
which the  Company's  international  subsidiaries  operate;  (x) claims that the
Company's technology violates the intellectual property rights of a third party;
(xi)  other  trends  in  competitive  or  economic  conditions   affecting  Iron
Mountain's   financial   condition  or  results  of  operations   not  presently
contemplated;  and (xii) other risks  described more fully in the Company's most
recently filed Annual Report on Form 10-K under "Item 1A. Risk Factors".  Except
as required by law, Iron Mountain  undertakes no obligation to release  publicly
the result of any revision to these forward-looking  statements that may be made
to reflect  events or  circumstances  after the date  hereof or to  reflect  the
occurrence of unanticipated events.

                                   -- more --



Iron Mountain Reports Third Quarter 2008 Financial Results / Page 5

APPENDIX A

Selected Financial Data:
(dollars in millions, except per share data)   Q3/2007   Q3/2008   Inc (Dec)
                                               -------   -------   --------
Revenues                                       $ 702     $ 784        12%

Gross Profit (excluding D&A)                   $ 379     $ 432        14%
Gross Margin %                                  54.0%     55.1%

OIBDA                                          $ 192     $ 211        10%
OIBDA Margin %                                  27.4%     26.9%

Operating Income                               $ 129     $ 136         6%
Interest Expense, net                          $  58     $  59         3%

Provision for income taxes                     $  11     $  50       370%
Effective tax rate                              17.0%     81.6%

Net Income                                     $  51     $  11       (78)%
EPS - Diluted                                  $0.25     $0.06

Components of Other Income (Expense), net:

Foreign Currency Exchange Gains (Losses)       $  (9)    $ (16)


                                          Q3/2008   YTD/2008
                                          -------   --------
Components of Revenue Growth:

Storage internal growth rate                   8%         8%
Service internal growth rate                   9%         9%
                                          -------   --------

    Total internal growth rate                 8%         8%

Impact of acquisitions                        >2%        >4%
Impact of foreign currency fluctuations       >1%        >2%
                                          -------   --------

    Total revenue growth                      12%        15%
                                          -------   --------
NOTE:  Column may not foot due to rounding.

APPENDIX B

Operating Income Before Depreciation and Amortization

Iron  Mountain  uses  Operating  Income  Before  Depreciation  and  Amortization
("OIBDA"),  an integral part of its planning and reporting systems,  to evaluate
the  operating  performance  of the  consolidated  business.  The  Company  uses
multiples of current and projected OIBDA in conjunction with its discounted cash
flow  models to  determine  its  overall  enterprise  valuation  and to evaluate
acquisition targets. The Company believes OIBDA and OIBDA Margin provide current
and  potential  investors  with  relevant and useful  information  regarding its
ability to generate cash flow to support business  investment and its ability to
grow revenues  faster than  operating  expenses.  OIBDA is not a measurement  of
financial  performance  under accounting  principles  generally  accepted in the
United  States,  or GAAP,  and  should not be  considered  as a  substitute  for
operating or net income or cash flows from  operating  activities (as determined
in accordance  with GAAP).

- -- more --



Iron Mountain Reports Third Quarter 2008 Financial Results / Page 6

Following is a reconciliation of operating income before depreciation and
amortization to operating income and net income (in millions):



                                                 Three Months Ended  Nine Months Ended
                                                    September 30,       September 30,
                                                 ------------------  -------------------
                                                   2007      2008      2007       2008
                                                 --------  --------  --------   --------
                                                                    
OIBDA (Operating Income Before Depreciation
   and Amortization)                             $    192  $    211  $    520   $    584
   Less: Depreciation and Amortization                 63        75       181        217

Operating Income                                 $    129  $    136  $    340   $    367

   Less: Interest Expense, net                         58        59       169        179
         Other Income (Expense), net                   (9)      (16)        2        (13)
         Provision for Income Taxes                    11        50        47         93
         Minority Interest                              1        --         1         --
                                                 --------  --------  --------   --------

Net Income                                       $     51  $     11  $    125   $     81
                                                 ========  ========  ========   ========

NOTE:  Columns may not foot due to rounding.

Free Cash Flows Before Acquisitions and Discretionary Investments, or FCF

FCF is defined as Cash Flows From Operating Activities less capital expenditures
(excluding  real  estate),  net of  proceeds  from  the  sales of  property  and
equipment  and other,  net, and  additions to customer  acquisition  costs.  Our
management  uses this measure when  evaluating  the  operating  performance  and
profitability  of  our  consolidated  business.  FCF  is  a  useful  measure  in
determining  our  ability  to  generate  cash  flows in  excess  of our  capital
expenditures  (both growth and maintenance) and our customer  acquisition costs.
As such, we believe this measure provides relevant and useful information to our
current and  potential  investors.  FCF should be considered in addition to, but
not as a substitute  for,  other measures of financial  performance  reported in
accordance  with  GAAP,  such  as  cash  flows  from  operating  activities  (as
determined in accordance with GAAP).

Following  is a  reconciliation  of Free  Cash  Flows  Before  Acquisitions  and
Discretionary Investments to Cash Flows from Operating Activities (in millions):

                                             Nine Months Ended
                                               September 30,
                                            -------------------
                                              2007       2008
                                            --------   --------

Free Cash Flows Before Acquisitions and
  Discretionary Investments                 $     95   $     86
  Add: Capital Expenditures (excluding
       real estate), net                         221        254
       Additions to Customer Acquisition
       Costs                                      12         10
                                            --------   --------
Cash Flows From Operating Activities        $    328   $    350
                                            ========   ========
  NOTE:  Columns may not foot due to rounding.

                                   -- more --



Iron Mountain Reports Third Quarter 2008 Financial Results / Page 7

                           IRON MOUNTAIN INCORPORATED
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                  (Amounts in Thousands except Per Share Data)
                                   (Unaudited)



                                                                   Three Months Ended           Nine Months Ended
                                                                     September 30,                September 30,
                                                              --------------------------    --------------------------
                                                                  2007           2008           2007          2008
                                                              -----------    -----------    -----------    -----------
                                                                                               
REVENUES:
   Storage                                                    $   383,390    $   421,673    $ 1,104,234    $ 1,242,185
   Service and Storage Material Sales                             318,443        362,665        898,800      1,060,394
                                                              -----------    -----------    -----------    -----------

      Total Revenues                                              701,833        784,338      2,003,034      2,302,579

OPERATING EXPENSES:
   Cost of Sales (Excluding Depreciation and Amortization)        322,598        352,251        925,566      1,046,973
   Selling, General and Administrative                            192,274        218,958        561,624        667,118
   Depreciation and Amortization                                   63,207         74,856        180,669        217,293
 (Gain) Loss on Disposal / Writedown of Property, Plant and        (5,033)         1,928         (4,639)         4,634
                                                              -----------    -----------    -----------    -----------
 Equipment, Net

      Total Operating Expenses                                    573,046        647,993      1,663,220      1,936,018
                                                              -----------    -----------    -----------    -----------

OPERATING INCOME                                                  128,787        136,345        339,814        366,561

INTEREST EXPENSE, NET                                              57,556         59,423        169,113        179,199
OTHER EXPENSE (INCOME), NET                                         8,504         15,660         (2,454)        13,157
                                                              -----------    -----------    -----------    -----------

      Income Before Provision for Income Taxes and Minority        62,727         61,262        173,155        174,205
         Interest

PROVISION FOR INCOME TAXES                                         10,647         50,010         46,754         93,141
MINORITY INTEREST IN EARNINGS OF SUBSIDIARIES, NET                    746            (62)         1,308            382
                                                              -----------    -----------    -----------    -----------

      Net Income                                              $    51,334    $    11,314    $   125,093    $    80,682
                                                              ===========    ===========    ===========    ===========

NET INCOME PER SHARE - BASIC                                  $      0.26    $      0.06    $      0.63    $      0.40
                                                              ===========    ===========    ===========    ===========
NET INCOME PER SHARE - DILUTED                                $      0.25    $      0.06    $      0.62    $      0.40
                                                              ===========    ===========    ===========    ===========

WEIGHTED AVERAGE COMMON SHARES OUTSTANDING - BASIC                200,203        201,575        199,742        201,100
                                                              ===========    ===========    ===========    ===========
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING - DILUTED              202,111        203,518        201,757        203,325
                                                              ===========    ===========    ===========    ===========

Operating Income before Depreciation and Amortization         $   191,994    $   211,201    $   520,483    $   583,854
                                                              ===========    ===========    ===========    ===========


                                   -- more --



 Iron Mountain Reports Third Quarter 2008 Financial Results / Page 8

                           IRON MOUNTAIN INCORPORATED
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                             (Amounts in Thousands)
                                   (Unaudited)



                                                        December 31,   September 30,
                                                           2007            2008
                                                        -----------    -----------
                                                                 
ASSETS

CURRENT ASSETS:
   Cash and Cash Equivalents                            $   125,607    $   318,244
   Accounts Receivable (less allowances of $19,246
      and $18,685, respectively)                            564,049        610,472
   Other Current Assets                                     132,740        153,584
                                                        -----------    -----------
         Total Current Assets                               822,396      1,082,300
                                                        -----------    -----------

PROPERTY, PLANT AND EQUIPMENT:
   Property, Plant and Equipment at Cost                  3,522,525      3,747,368
   Less: Accumulated Depreciation                        (1,186,564)    (1,356,255)
                                                        -----------    -----------
         Property, Plant and Equipment, net               2,335,961      2,391,113
                                                        -----------    -----------

OTHER ASSETS:
   Goodwill, net                                          2,574,292      2,581,278
   Other Non-current Assets, net                            575,272        583,003
                                                        -----------    -----------
         Total Other Assets                               3,149,564      3,164,281
                                                        -----------    -----------

         Total Assets                                   $ 6,307,921    $ 6,637,694
                                                        ===========    ===========

LIABILITIES AND STOCKHOLDERS' EQUITY

CURRENT LIABILITIES:
   Current Portion of Long-term Debt                    $    33,440    $    22,367
   Other Current Liabilities                                732,237        759,218
                                                        -----------    -----------
         Total Current Liabilities                          765,677        781,585

LONG-TERM DEBT, NET OF CURRENT PORTION                    3,232,848      3,393,367
OTHER LONG-TERM LIABILITIES                                 504,852        561,900

MINORITY INTERESTS                                            9,089          3,376

STOCKHOLDERS' EQUITY                                      1,795,455      1,897,466
                                                        -----------    -----------

         Total Liabilities and Stockholders' Equity     $ 6,307,921    $ 6,637,694
                                                        ===========    ===========


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