Communication of conditions at a primary storage controller to a host
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United States of America Patent
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Jun 30, 2015
Grant Date -
Oct 23, 2014
app pub date -
Jul 1, 2014
filing date -
Sep 29, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A primary storage controller is maintained in a copy relationship with a secondary storage controller, wherein the primary and secondary storage controllers are coupled to a host that is configurable to use the secondary storage controller instead of the primary storage controller. The primary storage controller determines occurrence of at least one condition in the primary storage controller, wherein the at least one condition occurs prior to a failure of the host to perform an Input/Output (I/O) operation with respect to at least one storage volume of the primary storage controller. The primary storage controller communicates the occurrence of the at least one condition to the host, wherein in response to the communicating the host is configured to determine whether to use the secondary storage controller instead of the primary storage controller based on the occurrence of the at least one condition.
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