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System and method for efficiently creating off-site data volume back-ups

  • US 20110167221A1
  • Filed: 04/01/2010
  • Published: 07/07/2011
  • Est. Priority Date: 01/06/2010
  • Status: Active Grant
First Claim
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1. A method of backing-up an active data volume in a data storage system, said method comprising:

  • creating a snapshot volume of said active data volume;

    creating a fingerprint data map of said snapshot volume, said fingerprint data map comprising an ordered list of data slice fingerprints, each of said data slice fingerprints comprising a statistically unique fingerprint of an associated data slice in said snapshot volume;

    copying unique data slices of said associated data slices to a back-up storage system; and

    storing said fingerprint data map in said back-up storage system.

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