| 摘要 |
High availability is provided in a multi-array storage system at the logical storage unit level. One or more storage arrays export logical storage units (LUNs). Each storage array maps the LUNs to physical groups of disks or disk partitions within the array. A controller coupled to the storage arrays arranges the LUNs from all the arrays so that one or more LUN(s) are designated as spare LUN(s). If a disk failure occurs within any disk in any array, the contents of one or more of the LUN(s) associated with the group of disks containing the failed disk are re-established on the spare LUN(s). If the physical groups of disks are RAID protected, then after affected LUNs are moved, the storage array containing the failed disk removes the failed disk from its group and re-establishes RAID protection across the remaining disks in the group.
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