Dot Hill's SANnet Receives Brocade Fabric Aware Certification for Interoperability

Completes End-to-End Interoperability and Performance Testing in Large-Scale Storage Area Network

Carlsbad, California, UNITED STATES

CARLSBAD, Calif., Dec. 12, 2001 (PRIMEZONE) -- Dot Hill Systems Corp. (NYSE:HIL), a leading provider of carrier-class information storage and storage area network (SAN) solutions, announced today that its SANnet(r) 7100 full fibre storage system has been verified by Brocade Communications Systems, Inc. as interoperable with Brocade-based storage area networking infrastructure in testing conducted through the Brocade Fabric Aware(tm) Program, an end-to-end interoperability initiative for enterprise SANs. The program is a comprehensive testing and configuration initiative designed to foster end-to-end SAN interoperability in multi-vendor Brocade-based SAN environments.

Testing was conducted at the Brocade interoperability labs, which are state-of-the-art facilities supporting end-to-end interoperability and performance testing of SAN products in multi-vendor and large fabric SAN environments. The Brocade Fabric Aware Program has added more than 40 partners since its launch in 2000. In addition, as part of its investment in SAN interoperability, Brocade actively supports its partners' interoperability initiatives.

"From its inception, SANnet was designed with open systems architecture to promote interoperability in the heterogeneous environments we often see in real-world enterprises," said Dana Kammersgard, Dot Hill's chief technology officer. "We realized early on that most enterprises operate in a multi-vendor setting, and we made a commitment to interoperability that continues as we add enhanced features and functionality to the SANnet product line. The Brocade Fabric Aware Program has been an excellent opportunity for us to further verify that SANnet is interoperable with Brocade fabric switches in an end-to-end enterprise SAN."

SANnet, Dot Hill's family of storage systems, contains hardware that is fully integrated with software and network-enabling accessories. Additionally, each SANnet solution comprises mix-and-match components that can be customized by interface, capacity requirements, type of RAID protection, and level of fault-tolerance. Dot Hill's industry leading, carrier-class storage systems ensure that the customer's most valuable digital assets are protected and continuously available. SANnet storage systems ensure 99.9998+ percent uptime, that's just 45 seconds unplanned downtime per year -- leading the industry in reliability, availability and survivability.

"We are pleased that Dot Hill has successfully completed the Fabric Aware testing with Brocade fabric switches in heterogeneous SAN environments," said Jay Kidd, Brocade vice president of Product Marketing. "Storage area networks are being deployed worldwide at a rapid rate as a scalable, high performance networking foundation for storage environments. End users are implementing large fabric SANs comprising hundreds of storage subsystems, servers, and networking technologies, all from multiple vendors. The Fabric Aware program is an example of our continued investment in delivering end-to-end SAN interoperability to our partners and their customers."

About the Brocade Fabric Aware Program

The Brocade Fabric Aware program is a comprehensive testing and configuration initiative designed to foster end-to-end SAN interoperability in a multi-vendor storage networking environments. As part of the program, companies agree to test in SAN configurations that comprise a heterogeneous mix of servers, storage subsystems, Brocade switches and other SAN technologies. Brocade has created an interoperability lab comprising a 24-switch SAN fabric, in which the company tests and validates partner equipment in specific configurations. Vendors receive Brocade Fabric Aware qualification after completing tests to confirm that vendors' products meet interoperability guidelines. For more information, visit

About Dot Hill

Dot Hill is a leading independent provider of carrier-class data storage solutions and services. With SANnet solutions that include storage area networks, NEBS Level 3 certified systems for Telco and Internet operations, and world-class service capabilities, Dot Hill is uniquely positioned to address the storage requirements of mission-critical continuous computing environments. Dot Hill's customers include many of the world's leading Internet service providers, common carriers, service and equipment providers, advanced technology and telecommunications companies, and government agencies. Dot Hill is an ISO 9002 certified company, and its web site is

SANnet is a registered trademark and Dot Hill and the Dot Hill logo are trademarks of Dot Hill Systems Corp. All other products and names mentioned herein are trademarks or registered trademarks of their respective owners.

Certain statements contained in this press release regarding matters that are not historical facts are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act. Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. "Forward-looking statements" include statements about any future occurrences (as opposed to historical fact) such as the amount and/or timing of SANnet sales due to SANnet's Fabric Aware certification, Brocade's switches compatibility with SANnet and SANnet's performance in particular environments, and the future availability of SANnet. The risks that contribute to the uncertain nature of the forward-looking statements include: rapid technological change, unforeseen supply, technological, intellectual property or engineering issues, evolving industry standards and changing customer preferences in the Open Systems computing market. However, there are many other risks not listed here that may affect the future business and financial results of Dot Hill, as well as the forward-looking statements contained herein. To learn more about such risks and uncertainties, you should read the risks and uncertainties set forth in the forms 10K and 10Q recently filed by Dot Hill. All forward-looking statements contained in this press release speak only as of the date on which they were made. Dot Hill undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made.



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