Storage device, backup and fault tolerant redundant method...

Details Storage device, backup and fault tolerant redundant method... Storage device, backup and fault tolerant redundant method...

2005-04-19

2005-04-19

Kim, Hong (Department: 2186)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C711S162000, C711S114000, C707S793000

Reexamination Certificate

active

06883112

ABSTRACT:
A storage device for which restoration of data is possible without the need for excess equipment includes mirrored storage units for online use and for backup, and is capable of performing a data backup while continuing input and output of data. The storage device is further provided with an update data storage unit for storing update data. According to the storage device, even if the information stored in a storage unit for online use is not capable of being read because of a fault in the storage unit, it is possible to restore the data in the backup storage unit to the state that existed in the storage unit for online use immediately before the fault by applying the update data to the information stored in the storage device for backup.

REFERENCES:
patent: 5615329 (1997-03-01), Kern et al.
patent: 6131147 (2000-10-01), Takagi
patent: 6266784 (2001-07-01), Hsiao et al.
patent: 6529944 (2003-03-01), LeCrone
patent: 6557089 (2003-04-01), Reed et al.
patent: 6795895 (2004-09-01), Merkey et al.
patent: 2002-108571 (2002-04-01), None

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