Method for adopting an orphan I/O port in a redundant storage controller
First Claim
1. A method for adopting an orphaned I/O port of a storage controller, the method comprising:
- routing interrupt requests from a third field-replaceable unit (FRU) to a first FRU, wherein the storage controller comprises the first FRU, a second FRU, and the third FRU, wherein the third FRU comprises an I/O port, wherein the I/O port generates the interrupt requests in response to receiving I/O requests from host computers, wherein the host computers are coupled to the I/O port;
processing the I/O requests received by the I/O port, wherein said processing the I/O requests received by the I/O port is performed by the first FRU in response to receiving the interrupt requests from the third FRU, wherein the I/O requests comprise requests by the host computers for the storage controller to transfer data between the host computers and one or more disk drives coupled to the storage controller;
determining that the first FRU has failed and is no longer processing I/O requests received by the I/O port, wherein said determining that the first FRU has failed and is no longer processing I/O requests received by the I/O port is performed by the second FRU; and
configuring the third FRU to route the interrupt requests from the I/O port to the second FRU rather than the first FRU, wherein said configuring the third FRU to route the interrupt requests from the I/O port to the second FRU rather than the first FRU is performed by the second FRU in response to said determining that the first FRU has failed.
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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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Citations
9 Claims
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1. A method for adopting an orphaned I/O port of a storage controller, the method comprising:
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routing interrupt requests from a third field-replaceable unit (FRU) to a first FRU, wherein the storage controller comprises the first FRU, a second FRU, and the third FRU, wherein the third FRU comprises an I/O port, wherein the I/O port generates the interrupt requests in response to receiving I/O requests from host computers, wherein the host computers are coupled to the I/O port; processing the I/O requests received by the I/O port, wherein said processing the I/O requests received by the I/O port is performed by the first FRU in response to receiving the interrupt requests from the third FRU, wherein the I/O requests comprise requests by the host computers for the storage controller to transfer data between the host computers and one or more disk drives coupled to the storage controller; determining that the first FRU has failed and is no longer processing I/O requests received by the I/O port, wherein said determining that the first FRU has failed and is no longer processing I/O requests received by the I/O port is performed by the second FRU; and configuring the third FRU to route the interrupt requests from the I/O port to the second FRU rather than the first FRU, wherein said configuring the third FRU to route the interrupt requests from the I/O port to the second FRU rather than the first FRU is performed by the second FRU in response to said determining that the first FRU has failed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification