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System and method for restoring a virtual disk from a snapshot

  • US 20060242179A1
  • Filed: 06/07/2006
  • Published: 10/26/2006
  • Est. Priority Date: 08/09/2002
  • Status: Active Grant
First Claim
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1. A method for restoring a virtual disk (vdisk) in an active file system to an earlier time, the method comprising the steps of:

  • maintaining pointers pointing to data represented by the virtual disk;

    saving the pointers to persistent storage at the earlier time;

    comparing a pointer at a later time with the pointers saved at the earlier time;

    if the pointer from the later time matches the pointer saved at the earlier time, keeping the pointer from the later time in the active file system; and

    if the pointer from the later time does not match the pointers saved at the earlier time, copying a set of pointers associated with the pointer saved at the earlier time to the active file system.

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