Data Mirroring and Shared Buses Lead to Patent for Dot Hill

5/19/2004 - Dot Hill Systems Corp. (Nasdaq: HILL) announced that the United States Patent and Trademark Office has granted the company U.S. patent 6,732,243, entitled "Data Mirroring and Shared Buses." The patent concerns Dot Hill's proprietary RAID controller technology, which it acquired along with Chaparral Network Storage in February of 2004. This is the first patent that has been granted to Dot Hill since its acquisition of Chaparral.

"We are extremely pleased with the acceptance of this patent as it demonstrates the caliber of engineering talent that we gained with the acquisition of Chaparral," said Jim Lambert, president and chief executive officer of Dot Hill. "We expect that this technology will provide our products with competitive features that will ultimately benefit our customers and partners."

The patented technology helps to alleviate bandwidth congestion by making use of shared buses -- not the I/O channels -- and direct memory access hardware to provide very high bandwidth and low-latency transfers of data between RAID controllers. These transfers are done without intervention of the server on the receiving controller. This improves performance because it allows for the controllers to direct bandwidth to other I/O processing tasks.

Dot Hill currently holds 30 patents and patents pending.

Dot Hill Systems Corp. is a leader in the innovative design and delivery of storage networking solutions to businesses worldwide. Its products include the SANnet(R) II family of storage systems and the RIO Xtreme(TM) Storage Servers. For more information, visit Dot Hill on the Web at

Dot Hill, the Dot Hill logo, SANnet, SANscape, SANpath, RIVA and RIO Xtreme are trademarks of Dot Hill Systems Corp.

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