| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost hierarchical storage system which has both high performance and large capacity. SOLUTION: The storage system includes a file server connected with a plurality of computers, a first storage device connected with the file server, and a second storage device connected with the first storage device. The second storage device has a second volume and the first storage device has a virtual volume virtualized with a first volume and the second volume as a self-device possessed volume. The file server mounts the first volume as a first directory, mounts the virtual volume as a second directory, and copies predetermined files in the second directory into the first directory. COPYRIGHT: (C)2009,JPO&INPIT
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