Remote copy control method, storage sub-system with the...

Details Remote copy control method, storage sub-system with the... Remote copy control method, storage sub-system with the...

2006-07-25

2006-07-25

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C714S006130, C714S016000, C714S020000, C714S042000

Reexamination Certificate

active

07082506

ABSTRACT:
Two data centers located in the vicinity are connected using a synchronous transfer copy function, and one of the data centers is coupled with a third data center disposed at a remote location by an asynchronous remote copying function. The order whereat a storage sub-system located in the vicinity has received data from a host is consistently guaranteed, and the third data center holds the data. Further, each storage sub-system includes a function whereby, during normal operation, data can be exchanged and the data update state can be obtained by the storage sub-systems located in the two data centers that do not directly engage in data transmission.

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