Method for adopting an orphan I/O port in a redundant storage controller
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United States of America Patent
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Jul 7, 2009
Grant Date -
Dec 14, 2006
app pub date -
Aug 22, 2006
filing date -
Sep 28, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A method for adopting an orphaned I/O port of a storage controller is disclosed. The storage controller has first and second redundant field-replaceable units (FRU) for processing I/O requests and a third FRU having at least one I/O port for receiving the I/O requests from host computers coupled to it. Initially the first FRU processes the I/O requests received by the I/O port and the third FRU routes to the first FRU interrupt requests generated by the I/O port in response to receiving the I/O requests. Subsequently, the second FRU determines that the first FRU has failed and is no longer processing I/O requests received by the I/O port, and configures the third FRU to route the interrupt requests from the I/O port to the second FRU rather than the first FRU, in response to the determining that the first FRU has failed.
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