Storage system and operation method of storage system

Details Storage system and operation method of storage system Storage system and operation method of storage system

2009-02-09

2011-12-13

Alsip, Michael (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S110000, C711S170000, C709S223000, C709S224000, C709S226000

Reexamination Certificate

active

08078810

ABSTRACT:
The present invention is able to improve the processing performance of a storage system by respectively virtualizing the external volumes and enabling the shared use of such external volumes by a plurality of available virtualization storage devices. By virtualizing and incorporating the external volume of an external storage device, a first virtualization storage device is able to provide the volume to a host as though it is an internal volume. When the load of the first virtualization storage device increases, a second virtualization storage device2is newly introduced, and connected to the storage system. When a transfer direction is issued from a management terminal, the external volume relating to the selected logical volume is transferred from the first virtualization storage device to the second virtualization storage device.

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