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AssigneeHitachi, Ltd.
InventorsToru Takahashi, Tatsundo Aoshima, Nobuo Beniyama, Takaki Kuroda, Tomoyuki Kaji, Tetsuya Maruyama
Estimating the term…
The present invention achieves data relocation in accordance with a user's policies, in an environment where a plurality of storage devices coexist. The volumes belonging to storage devices A-D are managed virtually integrally. A host recognizes a plurality of storage devices A-D as a single virtual storage device. The user is able to group arbitrarily each volume belonging to the storage system, as a plurality of storage layers 1-3. For example, storage layer 1 can be defined as a high-reliability layer, storage layer 2, as a low-cost layer, and storage layer 3, as an archive layer. Each storage layer is constituted by a group of volumes corresponding to respective policies (high reliability, low cost, archiving). The user designates volumes V1 and V2 to be moved, in group units, and indicates a storage layer forming a movement destination, whereby the data is relocated.
A computer system comprising:
A data migration method in a computer system having a storage system including a plurality of physical storage drives and a controller providing a plurality of volumes, where the controller uses a plurality of storage regions provided by the plurality of physical storage drives as a plurality of logical storage regions of the plurality of volumes, and a management computer, the data migration method comprising the steps of:
Dependencies are inferred from the claim text.