Initial copy system

Details Initial copy system Initial copy system

2005-07-15

2008-11-18

Portka, Gary J (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C707S793000

Reexamination Certificate

active

07454582

ABSTRACT:
A storage apparatus installed in a first site generates a snapshot of a copy source logical device in an intermediate logical device. Next, an external storage apparatus including a logical device corresponding to the intermediate logical device is disconnected from the first site and connected to the second site. A storage apparatus in the second site is made to recognize the logical device in the external storage device as a logical device of a remote copy target. Next, the storage apparatus instructs the second site about writing in the copy target logical device through a global network on the basis of the difference data managed with the bit map.

REFERENCES:
patent: 6728849 (2004-04-01), Kodama
patent: 2003/0014534 (2003-01-01), Watanabe et al.
patent: 2003/0088720 (2003-05-01), Fukuzawa et al.
patent: 10-283272 (1998-10-01), None
patent: 2003-099309 (2003-04-01), None

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