METHOD AND SYSTEM FOR REBUILDING DATA FOLLOWING A DISK FAILURE WITHIN A RAID STORAGE SYSTEM
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Dec 5, 2013
filing date -
Mar 15, 2013
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Abstract
A method and system for rebuilding data following a disk failure within a RAID storage system. The rebuild process keeps track of the relative number of READ operations across a RAID group so that following a RAID disk failure, the most frequently read areas of the RAID group can be rebuilt before less frequently accessed areas. Host READs to the rebuilt area will no longer necessitate on-the-fly rebuild from parity data, and thus host performance will be much less impacted than with prior rebuild processes.
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