News Release

FRAMINGHAM, Ma. & OAKDALE, Minn.--(BUSINESS WIRE)--Nov. 26, 2002--

GlassHouse will Use Imation's Storage Networking Lab for Client

Proof-of-Concept and Validation Testing Services

GlassHouse Technologies, Inc., the leading provider of vendor-neutral storage services, and Imation Corp. (NYSE:IMN), a worldwide leader in removable data storage media, today announced an agreement to work together to provide vendor-neutral storage networking guidance. Under terms of the agreement, GlassHouse will utilize Imation's Storage Networking Lab for proof-of-concept and validation services for GlassHouse clients. In addition, GlassHouse will utilize the lab for training and special projects.

The Imation Storage Networking Lab, which Imation launched in April 2000, is located at Imation headquarters in Oakdale, Minn. The lab is a world-class facility that offers vendor-independent testing and services to help companies and equipment manufacturers develop and evaluate data-storage solutions in an objective environment.

"Our clients have expressed a need for independent testing services," said Mark Shirman, CEO and President of GlassHouse. "This agreement will allow GlassHouse to draw on Imation's Storage Networking Lab, one of the leading testing facilities in the market today. We can now better ensure that our clients will be able to get the unbiased, vendor-neutral guidance and testing they need to help them formulate and implement storage strategies for their businesses."

"Imation's Storage Networking Lab fully supports the need in the market for independent storage networking testing," said Bill Monahan, Chairman and CEO of Imation. "We will continue to support and utilize this state-of-the-art facility, and anticipate that GlassHouse Technologies and its clients will benefit by being able to test and validate real-world storage networking architectures. The fact that GlassHouse provides top-tier, vendor-neutral consulting services makes them an ideal long-term client for Imation's lab."

About Imation's Storage Networking Lab

Imation's Storage Networking Lab provides a hands-on testing environment that makes integrating storage networking solutions into business environments as risk-free and cost-effective as possible.

The Imation Storage Networking Lab has over 150 pieces of equipment from over 60 manufacturers in 6,000+ square feet of dedicated lab space. Interested parties can take a "virtual" lab tour on Imation's website at http://www.imation.com/snltour and can download the latest equipment list.

About Imation Corp.

Imation Corp. is a leading developer, manufacturer and supplier of magnetic and optical removable data storage media. With one of the broadest product lines in the industry - spanning from a few megabytes to hundreds of gigabytes of capacity in each piece of media, Imation serves customers in more than 60 countries, in both business and consumer markets. From large data centers to distributed networks, Imation's tape cartridges are used in data processing, security, business continuity, backup and archiving applications. Customer needs for reliability, convenience and portability to store and manage business data, photos, video, images and music on professional and home desktops and increasingly in consumer electronics devices drive demand for Imation's optical and diskette products. With approximately 300 technology scientists and nearly 300 patents in the U.S. alone, Imation continues to pioneer today's proven magnetic and optical media technologies.

As of September 2002, Imation employed approximately 2,800 people worldwide. Revenues from outside the U.S. contribute approximately 49 percent of total sales. Additional information about Imation (NYSE:IMN) is available on the company's website at www.imation.com, or by calling (888) 466-3456.

About GlassHouse Technologies, Inc.

GlassHouse Technologies, Inc. provides services that help organizations solve the business problems of enterprise storage. From strategy through deployment and support, GlassHouse partners with clients to transform storage into a strategic advantage.

Headquartered in Framingham, MA, GlassHouse Technologies offers guaranteed, vendor-neutral storage services focused on technology and organizational effectiveness. From strategic assessments to solution maintenance, GlassHouse works with clients to maximize the organizational value of storage and backup technologies, enhancing client environments and meeting their business needs. For more information about GlassHouse Technologies, visit the company's website, www.glasshousetech.com, or call (508) 879-5729.

--30--JC/ms*