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Method and system for restoring data redundancy in a storage system without a hot standby disk

  • US 7,315,958 B1
  • Filed: 12/20/2002
  • Issued: 01/01/2008
  • Est. Priority Date: 10/23/1998
  • Status: Expired due to Term
First Claim
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1. A method for restoring data redundancy in a storage system having a plurality of data storage devices, comprising:

  • grouping a plurality of data storage devices into a plurality of failure groups, wherein each data storage device in a failure group shares one or more failure criteria;

    determining a reserve storage space based on a per failure group basis;

    maintaining the reserve storage space, the reserve storage space comprising unallocated storage space in one or more of the data storage devices of at least one of the plurality of failure groups; and

    restoring data redundancy on the reserve storage space on a non-ordinal basis when a data storage device failure is detected.

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