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PERFORMING MIRRORING OF A LOGICAL STORAGE UNIT

  • US 20100306488A1
  • Filed: 01/03/2008
  • Published: 12/02/2010
  • Est. Priority Date: 01/03/2008
  • Status: Active Grant
First Claim
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1. A method comprising:

  • performing mirroring of a logical storage unit initially associated with a first controller, wherein a first log segment associated with the first controller is maintained of writes by the first controller to the logical storage unit, the first log segment for use in mirroring writes to a mirror system;

    transferring control of the logical storage unit from the first controller to at least a second controller; and

    in response to the transfer, providing a first marker in the first log segment to enable the mirror system to synchronize mirrored writes corresponding to writes to the logical storage unit by the first controller and at least the second controller.

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