ADIC To Integrate Next Generation DLT 8000 Drives Into Industry's Broadest Line of DLTtape Libraries.

REDMOND, Wash.--(BUSINESS WIRE)--May 11, 1999--

Advanced Digital Information Corporation (Nasdaq:ADIC) today announced that it has completed testing and is now integrating Quantum Corporation's next-generation DLT 8000 tape drive into all of ADIC's DLTtape(tm) libraries.

The ADIC libraries, the broadest DLTtape-based product line in the industry, will immediately benefit from the new drive's increased capacity, helping ensure that ADIC products remain one of the leading choices for corporate data protection.

"Quantum's DLTtape technology is the market leader and industry standard for client/server backup, and it's apparent that the company plans to maintain that leadership by continually moving DLTtape technology forward," noted Bill Britts, ADIC executive vice president of sales and marketing. "The knowledge Quantum has gained from building more than a million DLTtape drives has gone into the new DLT 8000 program, and we're eager to deliver the benefits of that accumulated experience to our mutual customers as soon as possible."

The DLT 8000 will provide up to 80GB of compressed capacity, an increase of approximately 15 percent over current DLTtape drives. The new drive model will utilize the same DLTtape IV media as existing DLT 4000 and DLT 7000 drives, and will be fully backward compatible with those models.

ADIC will integrate the DLT 8000 into all of its current DLTtape products, from stand-alone drives to massive data center-class library systems. ADIC's DLT tape library family includes:

-- The award-winning FastStor DLTtape autoloader, one of the most

successful tape libraries ever introduced. -- The FastStor 22, ADIC's newest DLTtape library and 1999 winner of

PC Week's prestigious Best of Comdex award for best enterprise

peripheral. -- The Scalar 218FC, the industry's first FibreReady(tm) tape

library for direct connection to Fibre Channel Storage Area

Networks. -- Scalar 1000, the industry's most scalable library system, with

capacity of from 118 to 788 DLTtape cartridges. -- The AML series mixed media libraries. This product includes some

of the largest storage devices on the planet, with a capacity of

up to 256 DLTtape drives and more than 46,000 cartridges for

storage of nearly 4 million gigabytes (4 petabytes) of data.

About ADIC

With over 40,000 automated tape libraries installed and a suite of innovative software solutions and Storage Area Networking (SAN) products, ADIC is a leading global provider in the growing market to manage and protect information for computer networks. Marketed under ADIC and ADIC/GRAU brands and the brands of OEM partners, including Dell, Exabyte and Unisys, automated tape libraries are available with DLTtape, D2, half-inch, AIT, 4mm and 8mm tape technologies, and are supported by leading backup and storage management software products for Windows NT, UNIX, and MVS operating systems. The Company's own storage management tools include AMASS(R) direct data access software which provides network users shared access to information stored in automated libraries. A pioneer in marketing products for Storage Area Networks, ADIC offers Fibre Channel routers and tape libraries with direct Fibre Channel connectivity. Further product information is available via the Internet at www.adic.com.

ADIC, FastStor, Scalar, and FibreReady are trademarks of Advanced Digital Information Corporation. DLTtape is trademark of Quantum Corporation. All other product, trademark, company, or service names mentioned herein are the property of their respective owners. All capacities assume normal 2:1 compression.