Storage device and storage device control method

Details Storage device and storage device control method Storage device and storage device control method

2006-04-18

2006-04-18

Moazzami, Nasser (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S161000, C707S793000

Reexamination Certificate

active

07032091

ABSTRACT:
A storage device includes plural storage volumes for storing data, a unit for receiving a request for update of the data at a prescribed point in time to be stored in a first of the storage volumes after the prescribed point in time and a unit for storing a duplicate of the data at the prescribed point in time requested to be updated onto a second of the storage volumes, and a unit for storing in an unused storage area of a third of the storage volumes a duplicate of the data at the prescribed point in time requested to be updated according to a state of the second storage volume.

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EP 1148 416 A2 Oct. 24, 2001.

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