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Hardware I/O control block structure for mirrored and non-mirrored data transfers

  • US 6,934,771 B1
  • Filed: 02/12/2004
  • Issued: 08/23/2005
  • Est. Priority Date: 01/16/2002
  • Status: Expired due to Fees
First Claim
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1. A hardware I/O control block structure stored in a memory, said hardware I/O control block structure comprising:

  • one of a read command for a read transaction and a write command for a write transaction to be executed by a target device;

    a sister hardware I/O control block field; and

    a target identification field wherein upon said sister hardware I/O control block field containing a valid value when said hardware I/O control block structure is a new hardware I/O control block structure, said hardware I/O control block structure is for a mirrored data transaction using said target device identified using information in said target identification field.

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