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Virtual disk drive system and method

  • US 8,020,036 B2
  • Filed: 10/30/2008
  • Issued: 09/13/2011
  • Est. Priority Date: 08/14/2003
  • Status: Active Grant
First Claim
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1. A disk drive system manager, comprising:

  • means for classifying each of a plurality of storage devices based on the cost;

    means for checking data on the storage devices to determine whether there is data to be moved from one classification of storage device to another; and

    means for moving data stored on one or more storage devices of one classification to one or more storage devices of another classification;

    wherein data is moved to a lower cost storage device if the data has not been recently accessed.

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