| 摘要 |
A volume management system is provided which includes a storage device having plural logic areas, a computer which requests processes to the storage device, and a management server which communicates with the storage device and the computer. The management server includes a memory and a processor, the memory stores an area level indicative of released or unreleased, a priority level indicative of a priority for establishing a redundancy, a use status indicative of used or unused, and a state indicative of presence or absence of redundancies, for each of the logic areas of the storage device. When there is a logic area whose capacity is insufficient among the logic areas of the storage, the processor of the management server determines availability of released logic areas among the other logic areas of the storage device by referring to the area levels in the memory, when there are the released logic areas, the processor allocates capacities of the released logic areas to the logic area whose capacity is insufficient, when there are not enough capacities of the released logic areas, the processor determines availability of other unused logic areas by referring to the use statuses in the memory, when there are the other unused logic areas, the processor allocates unused capacities of each logic area to the logic area whose capacity is insufficient, and when there are not enough unused capacities of each logic area, the processor specifies other logic areas whose priority levels are below a predetermined upper-limit level of the priority level, releases redundancies of the other logic areas whose priority levels are below the predetermined upper-limit level of the priority level, and allocates released capacities of the other logic areas whose priority levels are below the predetermined upper-limit level of the priority level, to the logic area whose capacity is insufficient.
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