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Dynamic redistribution of parity groups

  • US 7,356,730 B2
  • Filed: 12/21/2004
  • Issued: 04/08/2008
  • Est. Priority Date: 01/29/2001
  • Status: Expired due to Fees
First Claim
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1. A method for storing data in a computer network, comprising:

  • determining a size of a parity group in response to a write request, said size describing a number of data blocks in said parity group;

    arranging at least a portion of data from said write request according to said data blocks;

    computing a parity block for said parity group;

    storing each of said data blocks on a separate disk drive such that no two data blocks from said parity group reside on the same disk drive;

    storing said parity block on a separate disk drive that does not contain any of said data blocks; and

    redistributing said parity group to improve storage efficiency.

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