Arcus Data Security, Inc. Announces Name Change to Iron Mountain Off-Site Data Protection, Inc.

Business Editors

BOSTON--(BUSINESS WIRE)--Sept. 10, 2001

Arcus Data Security, Inc. Announces Name Change

to Iron Mountain Off-Site Data Protection, Inc.;

New Name Better Reflects Alignment With

Iron Mountain Incorporated's Strategy and Focus on Service

Arcus Data Security, Inc., a wholly owned subsidiary of Iron Mountain Incorporated (NYSE: IRM), today announced that it has changed its name to Iron Mountain Off-Site Data Protection, Inc.

Iron Mountain acquired Arcus in January 1998, growing the business to its current size and strength through the acquisition of several industry-leading data security companies. As a result, Iron Mountain Off-Site Data Protection currently enjoys a position of world leadership in the off-site data protection industry. While Iron Mountain and Arcus have always been closely aligned in strategy and focus, they maintained separate brand identities, until now. According to Harry Ebbighausen, President of Iron Mountain Off-Site Data Protection, "This enables us to add new and innovative solutions to our product and service lines, enhancing the value that we deliver to our customers as well as to Iron Mountain's shareholders. The new name better reflects our tight integration with Iron Mountain's overall strategy and focus on service." Ken Rubin, EVP of Marketing for Iron Mountain, added, "This re-branding enables Iron Mountain Off-Site Data Protection to leverage the brand identity that Iron Mountain has built in the records and information management services industry, as well as its reputation as a trusted repository of critical data."

Iron Mountain Off-Site Data Protection is the leading provider of complete solutions for vaulting and protecting corporate backup data and disaster recovery support services. It is the only provider of such services with a national presence. The Company operates vaulting facilities strategically located near all major disaster recovery hotsites, a fleet of over 500 customized, environmentally controlled, trucks and vans and has priority access to a wide range of chartered aircraft.

About Iron Mountain

Iron Mountain Incorporated is the global leader in records and information management services. Iron Mountain currently provides services to over 125,000 customer accounts in 77 markets in the United States and 44 markets outside of the United States. The Company employs over 10,000 people and operates over 625 records management facilities in the United States, Canada, Europe and Latin America. For more information, visit our web site at www.ironmountain.com.