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Persistent reservation IO barriers

  • US 6,654,902 B1
  • Filed: 04/11/2000
  • Issued: 11/25/2003
  • Est. Priority Date: 04/11/2000
  • Status: Expired due to Term
First Claim
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1. A method for sharing a storage device among a plurality of computers while providing data integrity in the storage device, the method comprising the steps of:

  • registering a computer of the plurality of computers with the storage device by storing in the storage device a computer identifier associated with a reserved access type in the storage device; and

    upon loss of a knowledge of the stored identifier in the shared storage device by the registered computer, replacing the identifier for the registered computer stored in the shared storage device with a new identifier for the registered computer upon detection of a failure in one of the registered computers, un-registering the detected failed registered computer by one of a plurality of survivor registered computers by requesting deletion of the identifier associated with the reserved access type for the detected failed registered computer in the shared storage device.

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