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PARITY DATA MANAGEMENT SYSTEM APPARATUS AND METHOD

  • US 20090187786A1
  • Filed: 01/17/2008
  • Published: 07/23/2009
  • Est. Priority Date: 01/17/2008
  • Status: Active Grant
First Claim
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1. A method for parity data management, the method comprising:

  • receiving a write command comprising write data from a computing device;

    building a parity control structure in accordance with updating at least one data stripe of a redundant disk array with the write data;

    storing the parity control structure in a persistent memory buffer of the computing device;

    updating update the at least one data stripe with the write data in accordance with a RAID controller parity map; and

    restoring the RAID controller parity map from the parity control structure stored in the persistent memory buffer as part of a data recovery operation if updating the at least one data stripe is interrupted by a RAID controller failure resulting in a loss of the RAID controller parity map.

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