Unit attention processing in proxy and owner storage systems
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United States of America Patent
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Dec 20, 2016
Grant Date -
Jun 2, 2016
app pub date -
Feb 4, 2016
filing date -
Jun 12, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
Methods, apparatus and computer program products implement embodiments of the present invention that include a storage device configured to store a logical volume mapped between a host computer and a computer having multiple initiator ports, and a processor configured to detect a unit attention condition for the logical volume. Examples of unit attention conditions for the logical volume include management operations on the logical volume and host requests for the logical volume. Upon determining, based on the unique serial number, that the processor has previously conveyed the unit attention code to any of the multiple initiator ports, to reconvey an input/output (I/O) request, receive a response for the I/O request, and convey the result to the host computer.
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