Disk array controller including a plurality of access paths
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United States of America Patent
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Sep 30, 2003
Grant Date -
Jun 12, 2003
app pub date -
Nov 15, 2002
filing date -
Mar 17, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The disk array controller includes a plurality of interfaces with respective processors for connecting with a host computer or disk devices, duplicated shared memories connected in a one to one ratio between each interface and respective access paths, a selector connected to the plurality of interfaces, and a cache memory connected to the selector. The number of access paths between the selector and the plurality of interfaces is greater than the number of access paths between the cache memory and the selector. Each processor performs dual writing in the duplicated shared memories.
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