Apparatus and method to provide failover protection in an information storage and retrieval system
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United States of America Patent
Stats
-
May 13, 2008
Grant Date -
May 11, 2006
app pub date -
Oct 22, 2004
filing date -
Oct 22, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is disclosed for failover protection in an information storage and retrieval system comprising two clusters, two device adapters, and a plurality of data storage devices. The method provides a first device driver for a first device adapter and a second device driver for a second device adapter, and disposes those device drivers in both clusters. The method then places in operation the first device driver disposed in a first cluster, places in operation the second device driver disposed in a second cluster, and places in a standby mode the first device driver disposed in the second cluster. The method detects a failure of the first cluster, followed by a failure of the second device adapter. The method then makes operational the first device driver disposed in the second cluster, and continues to access information stored in the plurality of data storage devices using the first device adapter, and the first device driver disposed in the second cluster.
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