Three interconnected raid disk controller data processing system architecture
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United States of America Patent
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Dec 11, 2001
Grant Date -
N/A
app pub date -
Jun 29, 2000
filing date -
Jun 29, 2000
priority date (Note) -
Expired
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Abstract
A data processing system with a RAID cache disk subsystem utilizes three RAID cache disk controllers to provide increased performance along with increased reliability, especially in the event of a failure of one of the disk controllers. Disk writes are mirrored in two disk controllers in order to guarantee integrity in the event of a disk controller or interface failure. Typically this write caching must be terminated when one of the controllers fails in order to maintain integrity. In the present invention, write caching continues utilizing the two remaining disk controllers.
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