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Structure and method for message snooping in SCSI bus expanders

  • US 6,804,739 B1
  • Filed: 02/05/2002
  • Issued: 10/12/2004
  • Est. Priority Date: 02/05/2002
  • Status: Expired due to Fees
First Claim
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1. A SCSI expander comprising:

  • a first port;

    a second port;

    a message delay buffer coupled to said first port and to said second port;

    a message snooping status comprising a plurality of message status flags; and

    a message-snooping logic circuit coupled to said message delay buffer and to said message snooping status wherein upon detection of a pre-selected message being transferred between said first and second ports, said message-snooping logic circuit (i) asserts one of said plurality of message status flags, (ii) enables said message delay buffer to receive said selected message, and (iii) delays transfer of said pre-selected message between said first and second ports.

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