Compound storage system and storage control method
AssigneeHitachi, Ltd.
InventorsMiho Imazaki, Shigeo Homma, Hiroaki Akutsu, Yoshiaki Eguchi, Akira Yamamoto, Junji Ogawa
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Abstract
A shared device unit, which comprises a storage device, is coupled to a plurality of storage systems. The shared device unit provides a plurality of storage areas, which are based on the storage device, to the plurality of storage systems. Each storage system stores allocation management information which comprises an ID of a storage area provided to thereof among the plurality of storage areas, and provides the storage area corresponded to the ID included in the allocation management information to the host computer coupled thereto among the plurality of host computers.
Claims15
A compound storage system, comprising:
- a plurality of storage systems coupled to a plurality of host computers;
- and
- a shared device unit comprising a storage device, which is the basis of a plurality of storage areas that are provided to the plurality of storage systems;
- each storage system being configured to store allocation management information which comprises a respective ID for each of the areas, and provide the storage area corresponded to the ID included in the allocation management information to the host computer coupled thereto among the plurality of host computers, and
- a first storage area among the plurality of storage areas being provided to a first one of the storage systems, and a second storage area among the plurality of storage areas being provided to a second one of the storage systems.
A storage control method, comprising:
- providing, by a shared device unit, which comprises a storage device, a plurality of storage areas, which are based on the storage device, to a plurality of storage systems coupled to a plurality of host computers;
- storing, by each storage system, allocation management information which comprises a respective ID for each of the areas;
- and
- providing, by the each storage system, the storage area corresponded to the ID included in the allocation management information to the host computer coupled thereto among the plurality of host computers, and
- a first storage area among the plurality of storage areas being provided to a first one of the storage systems, and a second storage area among the plurality of storage areas being provided to a second one of the storage systems.
Dependencies are inferred from the claim text.