Cache synchronization in a RAID subsystem using serial attached SCSI and/or serial ATA
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United States of America Patent
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Feb 22, 2011
Grant Date -
Sep 18, 2008
app pub date -
Jun 2, 2008
filing date -
Mar 25, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A RAID system includes a pair of RAID controllers adapted to operate in active-active mode, each controller including a cache memory and at least one SAS/SATA I/O chip connected to a plurality of hard disk drives. Each SAS/SATA I/O chip includes more SAS/SATA ports than required to carry data to the hard drives. The caches in the respective controllers are synchronized via the extra SAS/SATA ports in each controller.
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