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Methods and apparatuses for providing copies of stored data for disaster recovery and other uses

  • US 7,441,052 B2
  • Filed: 09/29/2003
  • Issued: 10/21/2008
  • Est. Priority Date: 09/29/2003
  • Status: Expired due to Fees
First Claim
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1. In a system comprising a first computer coupled to first and second storage devices, a method for providing copies of data, the method comprising:

  • cross-referencing (a) a hardware address identifying the first storage device and (b) a first device identifier for representing the first storage device to a program in the first computer;

    cross-referencing (a) a hardware address identifying the second storage device and (b) a first device identifier for representing the second storage device to a program in the first computer;

    pairing the first and second storage devices;

    adding the pair, by information other than first device identifiers, to a copy group already containing another storage-device pair;

    identifying the copy group;

    cross-referencing the copy-group identifier and the first device identifiers of the pair; and

    preparing to copy data, using the cross-reference.

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