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VOLUME CHANGE FLAGS FOR INCREMENTAL SNAPSHOTS OF STORED DATA

  • US 20140258613A1
  • Filed: 08/20/2013
  • Published: 09/11/2014
  • Est. Priority Date: 03/08/2013
  • Status: Abandoned Application
First Claim
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1. A backup system for a Redundant Array of Independent Disks (RAID) storage system, the backup system comprising:

  • a backup storage device that includes Copy-On-Write snapshots of a logical volume of the storage system; and

    a backup controller operable to maintain flags for the logical volume that indicate whether extents at the logical volume have been modified since a previous snapshot was created, and to move the flags from the logical volume to a new Copy-On-Write snapshot of the volume when the new Copy-On-Write snapshot is created.

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