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Method and apparatus for mirroring data stored in a mass storage system

  • US 7,197,614 B2
  • Filed: 05/07/2003
  • Issued: 03/27/2007
  • Est. Priority Date: 05/08/2002
  • Status: Active Grant
First Claim
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1. A method of mirroring a storage device comprising:

  • copying data stored on a first storage device to a second storage device, while simultaneously flushing a write cache to both the first and second storage devices;

    temporarily halting execution of application programs after the data stored in the first storage device is copied to the second storage device;

    halting writes to the second storage device; and

    restarting execution of application programs to use the first storage device to store data.

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