| 摘要 |
The storage virtualizer does not repeatedly switch a path used by a host computer when failure occurs in a path between a physical storage unit and a virtual storage unit. The storage virtualizer comprises: a plurality of targets connectable to the host computer; a unit for connecting at least one physical storage unit to the targets via a plurality of paths; a virtualization unit producing at least one virtual storage unit by at least a part of a storage area of the physical storage unit and allowing the host computer to access to the virtual storage unit, the virtualization unit real-accessing to the physical storage unit via the path corresponding to the target accessed when the access is executed; means for detecting failure of real access to the physical storage via each of the paths; and a target control unit blocking the target corresponding to the failure path, which is detected by the detecting means, with respect to the host computer.
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