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Methods and systems for data recovery

  • US 8,010,502 B2
  • Filed: 04/11/2008
  • Issued: 08/30/2011
  • Est. Priority Date: 04/13/2007
  • Status: Active Grant
First Claim
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1. A method for recovering deleted files in a data store comprising a FAT file system, comprising:

  • identifying candidate blocks of a data store, each candidate block comprising a plurality of portions;

    determining for each of the candidate blocks a first probability that the candidate block contains a directory entry based upon one of the plurality of portions;

    determining for each of the candidate blocks a second probability that the candidate block contains a directory entry based upon another one of the plurality of portions;

    combining the first probability and second probability to form a combined probability;

    wherein the first and second probabilities are based on the portion being part of a valid directory entry;

    extracting directory entry metadata for candidate blocks that have a combined probability that is greater than a predetermined probability threshold; and

    recovering the content of a deleted file using the extracted directory entry metadata.

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