Method of managing raid level bad blocks in a networked storage system
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United States of America Patent
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Apr 21, 2009
Grant Date -
Mar 3, 2005
app pub date -
Mar 8, 2004
filing date -
Aug 27, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of managing bad blocks in a RAID storage system. The system restores physical storage media and stripe redundancy by reassigning sectors and creating a bad block tracking structure. The bad block tracking structure consists of a volume map, a redundancy group table, and a bad block table that stores a bad block list. Redundancy is achieved through RAID 1 or RAID 10 mirroring rather than through the parity restoration required by conventional systems. The tracking structure returns media error status data to the originating host on volume read commands. The structure accepts volume write data from the originating host and then deletes the bad block tracking structure.
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