Data storage system and control method thereof

Details Data storage system and control method thereof Data storage system and control method thereof

2005-03-29

2009-10-20

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C711S114000, C711S161000, C711S162000

Reexamination Certificate

active

07607034

ABSTRACT:
Hard discs constituting a disc array system are arranged at locations far from one another so as to eliminate their simultaneous damage due to a local disaster and concentration of the processing load thereby suppressing the recovery time upon hard disc failure. It is possible to realize continuous operation without system down even when the other disasters have occurred.A plurality of hard disc devices are arranged at different locations far from one another, write-in data from a server device is mapped by the RAID method, and a data packet added by the RAID information and the error correction code is distributed to the respective hard discs. Moreover, the line connection device for performing data transfer to the hard disc device has the RAID control function while the main control device is dedicated to monitoring of the hard disc devices and data recovery process upon occurrence of a failure. Moreover, backup of the restored data is transmitted to the server device during a failure recovery process so that recovery re-execution can easily be performed by using the backup when data recovery has not terminated normally.

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