COMPOUND STORAGE SYSTEM AND STORAGE CONTROL METHOD

摘要

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.

主权项

1. A storage system comprising:
a plurality of storage systems proving a virtual volume; and a shared storage device whose storage areas provide a pool, wherein a first storage area in the pool is allocated to a first virtual volume for storing data to the first virtual volume and a second storage area in the pool is allocated to a second virtual volume for storing data to the second virtual volume, wherein the first virtual volume is a virtual volume provided by a first one of the storage systems to a first host computer and the second virtual volume is a virtual volume provided by a second one of the storage systems to a second host computer.