Method for creating a virtual data copy of a volume being...

Details Method for creating a virtual data copy of a volume being... Method for creating a virtual data copy of a volume being...

2006-08-15

2006-08-15

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S114000, C707S793000

Reexamination Certificate

active

07093090

ABSTRACT:
In one embodiment of the method, first and second data volumes are created. Thereafter, a first data portion of the first data volume is overwritten with a first data portion of the second data volume. A second data portion of the first data volume is overwritten with a second data portion of the second data volume. In one embodiment, the first and second data portions of the first data volume are overwritten with the first and second data portions of the second data volume, respectively, in response to a command to restore or synchronize the data contents of the first data volume to the data contents of the second data volume. A virtual point-in-time (PIT) copy of the first data volume is created after overwriting the first data portion but before overwriting the second data portion.

REFERENCES:
patent: 2003/0084242 (2003-05-01), Strange et al.
patent: 2004/0002934 (2004-01-01), Taulbee et al.
patent: 2005/0010733 (2005-01-01), Mimatsu et al.

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