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Pool spares for data storage virtualization subsystem

  • US 8,281,090 B2
  • Filed: 10/09/2006
  • Issued: 10/02/2012
  • Est. Priority Date: 10/11/2005
  • Status: Active Grant
First Claim
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1. A method for selecting a spare physical storage device to use in a data storage virtualization subsystem comprising a plurality of normally-used physical storage devices, the method comprising the steps of:

  • defining at least one section of the plurality of normally-used physical storage devices as a logical media unit;

    defining at least one of the plurality of normally-used physical storage devices as a physical storage device pool according to a pool ID for identifying the physical storage device pool;

    providing a pool spare physical storage device designated to said physical storage device pool and providing at least one non-pool spare physical storage device;

    selecting the pool spare physical storage device as a spare physical storage device for replacing one of the plurality of normally-used physical storage devices in the physical storage device pool when the one of the plurality of normally-used physical storage devices is to be replaced, if the pool spare physical storage device is available, wherein the pool spare physical storage device is used as a spare physical storage device for the physical storage device pool; and

    selecting the at least one non-pool spare physical storage device as a spare physical storage device for replacing the one of plurality of normally-used physical storage devices in the physical storage device pool when the one of the plurality of normally-used physical storage devices is to be replaced, if the pool spare physical storage device is not available.

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