Method and apparatus for storage system

Details Method and apparatus for storage system Method and apparatus for storage system

2005-07-26

2005-07-26

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S161000, C711S112000, C711S114000, C707S793000, C714S001000, C714S002000, C714S003000, C714S004110, C714S005110, C714S006130, C714S006130

Reexamination Certificate

active

06922763

ABSTRACT:
The following steps are performed in a storage system: when volumes configuring each volume pair are used by separate applications, storing, for each pair in a memory, an address where updating of data has been made in the volumes as updated-location-managing information; in case a destination-of-restoring copy volume configuring one pair is to be restored to have the contents of a source-for-restoring copy volume belonging to another pair, obtaining, from the memory, pieces of the updated-location-managing information for each of the pairs; generating differential information by merging the pieces of updated-location-managing information obtained, the differential information indicative of a difference in the pieces of updated-location-managing information between the copy volumes; and reproducing the destination-of-restoring copy volume to have the contents of the source-for-restoring copy volume, by copying data designated by the differential information from the source-for-restoring copy volume to the destination-of-restoring copy volume.

REFERENCES:
patent: 2004/0230756 (2004-11-01), Achiwa et al.
patent: 2005/0021627 (2005-01-01), Achiwa et al.
patent: 2001-034426 (2001-02-01), None

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