System and method for optimizing establishment of mirrored data

Details System and method for optimizing establishment of mirrored data System and method for optimizing establishment of mirrored data

2005-03-01

2005-03-01

Vital, Pierre M. (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S161000, C711S168000, C711S202000, C711S209000, C707S793000, C714S006130

Reexamination Certificate

active

06862671

ABSTRACT:
The present invention is directed to a system and method for optimizing establishment of mirrored data. In an aspect of the present invention, a method of tracking changes to mirrored storage system including a first storage device and a second storage device may include creating a map including at least one map entry having an identifier suitable for describing a range of addressable data blocks. The range of addressable data blocks includes at least one data block modified after operation of the first storage device is suspended. At least one of a range of addressable data blocks described by at least one map entry of the map and a number of map elements copied per establish command is specified. The map including the at least one map entry on the second storage device is stored. The map is suitable for being utilized to restore data stored on the second storage device to at least one of the first storage device and a third storage device.

REFERENCES:
patent: 5640561 (1997-06-01), Satoh et al.
patent: 5649152 (1997-07-01), Ohran et al.
patent: 6035412 (2000-03-01), Tamer et al.
patent: 6324654 (2001-11-01), Wahl et al.
patent: 6499091 (2002-12-01), Bergsten

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