Fibre channel input/output data routing system and method
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United States of America Patent
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Jan 29, 2013
Grant Date -
Dec 6, 2012
app pub date -
Jun 1, 2011
filing date -
Jun 1, 2011
priority date (Note) -
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Abstract
A computer program product is provided for performing input/output (I/O) processing at a host computer system. The computer program product is configured to perform: generating an address control structure for each of a plurality of consecutive data transfer requests specified by an I/O operation, each address control structure specifying a location in the local channel memory of a corresponding address control word (ACW) that includes an Offset field indicating a relative order of a data transfer request; generating and storing in local channel memory at least one ACW specifying one or more host memory locations for the plurality of consecutive data transfer requests and including an Expected Offset field indicating a relative order of an expected data transfer request; receiving a transfer request from the network interface and comparing the Offset field and the Expected Offset field to determine whether the data transfer request has been received in the correct order.
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