Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-05-02
2006-05-02
Anderson, Matthew D. (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S112000, C707S793000
Reexamination Certificate
active
07039778
ABSTRACT:
In a data backup method in a network storage system in which mirroring is conducted between two disk units, the mirroring is delayed by accumulating update data in a cache for a predetermined period of time. When storing the update data in the cache, files are related to each other, and information of file open and close is also stored. The update data is reflected in the mirrored disk using the file open and close information. As a result, the contents of the mirrored disk are delayed for a predetermined period of time from those of the primary disk, and all files are in other than the open state. Within a range of the period to store data in the cache, it is possible to restore data created at a point of time preceding a desired period of time. This enables recovery if a user erases files by mistake.
REFERENCES:
patent: 5325509 (1994-06-01), Lautzenheiser
patent: 5734818 (1998-03-01), Kern et al.
patent: 5893140 (1999-04-01), Vahalia et al.
patent: 5907672 (1999-05-01), Matze et al.
patent: 6081807 (2000-06-01), Story et al.
patent: 6085298 (2000-07-01), Ohran
patent: 6260125 (2001-07-01), McDowell
patent: 6324654 (2001-11-01), Wahl et al.
patent: 6549992 (2003-04-01), Armangau et al.
patent: 6662197 (2003-12-01), LeCrone et al.
patent: 6842825 (2005-01-01), Geiner et al.
patent: 2002/0065999 (2002-05-01), Kikuchi et al.
patent: 2004/0064488 (2004-04-01), Sinha
patent: 2005/0005070 (2005-01-01), Lam
patent: 2005/0071393 (2005-03-01), Ohno et al.
Anderson Matthew D.
Krofcheck Michael
Mattingly ,Stanger ,Malur & Brundidge, P.C.
LandOfFree
Data backup method in a network storage system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data backup method in a network storage system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data backup method in a network storage system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3628557