Storage control apparatus and failure recovery method for storage control apparatus
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United States of America Patent
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Jun 16, 2009
Grant Date -
May 29, 2008
app pub date -
Oct 17, 2006
filing date -
Aug 25, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A storage control apparatus of the present invention reduces the frequency of disk drive failures. An error management part manages the number of times errors occur in respective disk drives. A disk drive in which the number of errors meets or exceeds a threshold value is selected as a disk drive to be restarted. A restart control part commences difference management prior to restarting the disk drive targeted for restart. A difference management part manages parity group-related update locations using a difference bitmap. After commencing difference management, the restart control part restarts the disk drive in which the error was detected. This makes it possible to resolve an error caused by a firmware hangup or the like.
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