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Method and system for repairing partially damaged blocks

  • US 7,716,519 B2
  • Filed: 04/19/2006
  • Issued: 05/11/2010
  • Est. Priority Date: 11/04/2005
  • Status: Active Grant
First Claim
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1. A computer readable medium comprising software instructions to reconstruct a logical block, wherein the logical block comprises a first set of sectors, when executed the software instructions configured to:

  • obtain a copy of the logical block comprising a second set of sectors;

    determine which of the sectors in the first set of sectors are identical to sectors in the second set of sectors to obtain identical sectors;

    select a first combination of non-identical sectors from the first set of sectors and the second set of sectors;

    combine a copy of each of the identical sectors with the first combination of non-identical sectors to obtain a first reconstructed logical block;

    calculate a first checksum for the first reconstructed logical block; and

    determine whether the first calculated checksum is equal to the stored checksum associated with the first logical block.

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