Storage subsystem
AssigneeHitachi Global Storage Technologies Japan, Ltd.
InventorsKiyoshi Honda, Atsushi Takayasu, Eisaku Saiki
Life of this patent
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Abstract
A control method which is used in a RAID1 storage subsystem including a plurality of storage devices, and processes an access request from a host computer with the cooperation of the plurality of storage devices of the storage subsystem is provided. In the storage subsystem, each storage device of the RAID1 storage subsystem includes a unit for sharing an access request from the host computer, and a unit for determining if the storage device should process the shared access request. The storage device further includes a unit for transferring write data, which is transmitted from the host computer to the storage subsystem, to at least a storage device that should process it.
Claims24
A storage subsystem comprising a plurality of storage devices connected to a host computer, wherein
- a first storage device included in said plurality of storage devices comprises:
- means for receiving a request for information processing for said storage subsystem, said information processing being executed in said host computer;
- means for transferring the received request to a second storage device included in said plurality of storage devices;
- and
- means for executing information processing indicated by the received request when the received request should be executed by said first storage device.
A storage subsystem comprising a plurality of storage devices connected to a host computer, wherein
- a first storage device included in said plurality of storage devices comprises:
- a receiver connected to the host computer, for receiving a request for information processing for said storage subsystem, said information processing being executed in said host computer;
- a transceiver connected to said receiver and a second storage device included in the plurality of storage devices, for transferring the received request to the second storage device;
- and
- a processor for executing the information processing indicated by the received request when the received request should be executed by said first storage device.
A storage control method which uses a storage subsystem comprising a plurality of storage devices connected to a host computer and includes a first storage device, wherein
- said first storage device executes:
- a step of receiving a request for information processing for said storage subsystem, said information processing being executed in said host computer;
- a step of transferring the received request to a second storage device included in said plurality of storage devices;
- and
- a step of executing information processing indicated by the received request when the received request should be executed by said first storage device.
Dependencies are inferred from the claim text.