Information processing system, primary storage device, and...

Details Information processing system, primary storage device, and... Information processing system, primary storage device, and...

2005-05-11

2009-08-04

Sough, Hyung S (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S122000

Reexamination Certificate

active

07571291

ABSTRACT:
In a hierarchical storage system, a primary storage device interposed between a secondary storage device and a data processing apparatus has a restoring unit. When at least two current storage units, which configure a logical volume and are in the mirroring relationship, concurrently fail, the restoring unit reads out data recorded in a logical volume of the current storage units from a virtual logical volume of the secondary storage device, records the data on the at least two spare storage units, thereby restoring, on the spare storage units, the logical volume of the current storage units. Even when a plurality of storages configuring a logical volume and being in the mirroring relationship concurrently fail, it is possible to immediately restore the logical volume without the maintenance operation or the like.

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Japanese Notice of Reason for Refusal issued Mar. 30, 2009 in corresponding Japanese Application No. 2005-000855.

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