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Preserving a snapshot of selected data of a mass storage system

  • US 20030101321A1
  • Filed: 11/29/2001
  • Published: 05/29/2003
  • Est. Priority Date: 11/29/2001
  • Status: Active Grant
First Claim
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1. In a computer system having a mass storage device that stores data in a plurality of data blocks and has access to a data storage location that contains a snapshot copy of the data, a method of backing up to the snapshot copy data blocks that have been designated to be backed up, wherein the method comprises the acts of:

  • identifying data blocks that have changed at the mass storage device during a specified time period;

    designating data blocks from among the identified data blocks as being data blocks that are to be backed up, wherein other data blocks from among the identified data blocks are not to be backed up; and

    transmitting a copy of the designated data blocks to the data storage location that contains the snapshot copy such that the transmitted copies of the data blocks can be included in the snapshot copy.

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