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Method and system using checksums to repair data

  • US 20070106925A1
  • Filed: 04/19/2006
  • Published: 05/10/2007
  • Est. Priority Date: 11/04/2005
  • Status: Active Grant
First Claim
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1. A method for reconstructing corrupted data, comprising:

  • determining a number of non-parity disks (n);

    selecting a first combination of n-1 non-parity disks;

    obtaining a first set of physical blocks from the first combination of n-1 non-parity disks;

    obtaining a parity block associated with the first set of physical blocks;

    reconstructing a first physical block using the first set of physical blocks and the parity block;

    combining the first physical block and the first set of physical blocks to obtain a first reconstructed logical block;

    checksuming the first reconstructed logical block to obtain a first calculated checksum; and

    determining whether the first calculated checksum is equal to a stored checksum associated with the first reconstructed logical block.

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