| 摘要 |
PROBLEM TO BE SOLVED: To improve the I/O performance of a host being reconstructed and the availability of a storage array. SOLUTION: The host I/O performance and the availability of the storage array are improved by giving a priority to an I/O request. In one embodiment, when the storage array is in the middle of permanently losing data (e.g. data are lost due to the failure of another prescribed disk), a priority over the host I/O request is given to a reconstruction I/O request. The reconstruction I/O request has the priority over the host I/O request until the storage array is not in the middle of permanently losing the data any more, and when the storage array is not in the middle of permanently losing the data, a priority over the reconstruction I/O request is given to the host I/O request.
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