Data storage systems and methods having block group error correction for repairing unrecoverable read errors
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United States of America Patent
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Issued Date -
Feb 26, 2009
app pub date -
Jul 18, 2008
filing date -
Jul 18, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Data storage systems and methods perform error correction on a single physical storage disk. The technique includes arranging a plurality of addressable blocks on the single physical storage disk into error correction groups, wherein each error correction group includes N data blocks and M coding blocks. M is determined in accordance with a desired failure tolerance of the error correction groups and an error-correcting code. For each error correction group, error-correcting code data is computed across the N data blocks in the error correction group. The computed error-correcting coding data is stored in the M coding blocks in the error correcting group. The arranging, computing and storing steps are performed by a hardware or software component external to the single physical storage disk.
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