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LSI Logic SCSI controller supports 640MBps transfers

Posted: 23 Apr 2002 ?? ?Print Version ?Bookmark and Share

Keywords:lsi53c1030? lsi53c1020? scsi controller? dual channel controller? single channel controller?

LSI Logic Corp. has begun commercial production of two controllers that meet the Ultra320 SCSI standard, supporting burst data-transfer speeds of 320MBps over a single channel and of twice that speed with a dual-channel controller.

Ultra320 is the seventh-generation parallel SCSI standard and perhaps the last before Serial Attached SCSI is phased-in over the next few years. The controllers reside on servers and workstations, and major server and drive manufacturers are in the midst of introducing hardware that supports the Ultra320 standard.

Roger Cox, storage analyst at Gartner Dataquest, said LSI Logic has achieved design wins at the server divisions of Dell and IBM for systems expected to reach the market in the second half of this year. The Ultra320 market will move into full gear next year, and LSI Logic appears to have "gotten a jump on this market," he said.

LSI Logic used two instantiations of the ARM9 controller, running at 100MHz or faster, on its single-channel device, with the first ARM processor handling context management, and the second serving as I/O processor. The double-channel controller has three ARM9 controllers.

LSI Logic's devices support the RAID-1 standard for physical mirroring, so they present two drives to a system's OS during boot-up. While RAID support is not a part of the Ultra320 standard, LSI Logic plans to support RAID 5 functionality for multiple drives in its controllers.

A modular design style used by LSI Logic allows for the quick addition of logic to support full RAID functions, said David Steele, a marketing manager at the company.

Analyst Cox said the inclusion of RAID 5 functions on the controller silicon could have an eventual impact on the market for discrete RAID devices, including those of LSI Logic.

The LSI53C1030 dual-channel controller lists for $153.88, and the LSI53C1020 single-channel device is priced at $96.94. Commercial production began this week on LSI Logic's 0.18?m process.

David Lammers

EE Times

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