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STORAGE SYSTEM HAVING RAID LEVEL CHANGING FUNCTION

  • US 20090037656A1
  • Filed: 01/09/2008
  • Published: 02/05/2009
  • Est. Priority Date: 07/31/2007
  • Status: Active Grant
First Claim
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1. A storage system, comprising:

  • a plurality of storage devices having not less than two member storage devices which are storage devices provided as members of a RAID group, and either one or a plurality of spare storage devices which are spare storage devices that are not members of the RAID group; and

    a controller for changing a RAID level of the RAID group from a first RAID level to a second RAID level in use of a spare storage device selected from among the either one or a plurality of spare storage devices.

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