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Method and apparatus for differential backup in a computer storage system

  • US 20020059505A1
  • Filed: 12/20/2001
  • Published: 05/16/2002
  • Est. Priority Date: 06/30/1998
  • Status: Abandoned Application
First Claim
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1. A method of backing up data in a computer storage system, the data being stored in a plurality of identifiable segments, the method comprising steps of:

  • (a) at a first time, identifying which segments have been changed since a preceding backup; and

    (b) forming a first backup that includes a copy of the identified changed segments and omits at least one of the segments that has not changed; and

    wherein the identifiable segments are formed in units corresponding to physical segments of storage in the computer storage system.

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