| 摘要 |
A storage system that dynamically allocates storage areas to a volume accessed by a host system, in response to access from the host system, wherein allocation of storage areas to one volume has no impact on any allocation of storage areas to the other volumes is provided. At least one storage area that can be allocated to a virtual volume is pooled, and upon access from the host system to the virtual volume, a storage area in the pool is allocated to the virtual volume. At this time, upon access from the host system exceeding a limit provided to the host system/the virtual volume for the allocation of the storage area, an error notice is returned to the host system without allocating the storage area in the pool to the virtual volume.
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