Computer system storing data on multiple storage systems

Details Computer system storing data on multiple storage systems Computer system storing data on multiple storage systems

2011-04-26

2011-04-26

Thai, Tuan V (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S004000, C711S100000, C711S112000, C711S114000, C711S115000, C711S162000, C707S610000, C707S640000, C707S649000, C707S655000, C707S656000, C707S658000, C707S661000, C707S662000

Reexamination Certificate

active

07934065

ABSTRACT:
During the normal operation state of a computer system1000, the data stored in a primary storage system200P is copied to an intermediate storage system200I via synchronous copying and the data stored in the intermediate storage system200I is copied to a secondary storage system200R via asynchronous copying. During the reverse operation state, however, the data stored in the secondary storage system200R is copied to the intermediate storage system200I via asynchronous copying and the data stored in the intermediate storage system200I is copied to the primary storage system200P via synchronous copying. In this way, practical remote copying can be carried out in a computer system in which three or more storage devices are installed at different locations and connected serially.

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