Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2001-05-23
2003-02-11
Nguyen, T. V. (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S111000, C711S114000, C711S161000
Reexamination Certificate
active
06519687
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a file mirroring drive, and more particularly to a file mirroring drive that mirrors data on a file basis.
In general, a disk failure that occurs in a data processor sometimes destroys files and results in a loss of critical data. One way to prevent data from being destroyed is to mirror a disk. That is, all data in a disk is copied to another place. A conventional data processor duplicates data on a disk volume basis to prevent data from being destroyed.
However, on a unit such as a personal computer, the critical files to be duplicated are only apart of all files. Considering the cost, it is not practical to mirror data on a volume basis. Because the minimum unit of mirroring is a disk volume, the whole disk volume must be mirrored at mirroring time even if the user wants only some files to be fault-tolerant.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a file access processor which mirrors data on a file basis.
According to one aspect of the present invention, a file access processor, which accesses a storage unit storing a plurality of files therein based on an access request from a request source, is provided which includes: a mirroring relation storage unit in which mirroring relation information is stored, wherein the mirroring relation information includes a mirroring attribute value indicating whether or not each file is to be mirror-accessed and, when the file is to be mirror-accessed, mirroring file information indicating a mirroring file corresponding to the file; and a file access processing unit which references the mirroring relation information based on the access request and accesses the storage unit.
REFERENCES:
patent: 5893919 (1999-04-01), Sarkozy et al.
patent: 5974506 (1999-10-01), Sicola et al.
patent: 6098119 (2000-08-01), Surugucchi et al.
patent: 6385707 (2002-05-01), Maffezzoni
patent: 6405284 (2002-06-01), Bridge
NEC Corporation
Nguyen T. V.
LandOfFree
File mirroring drive that mirrors data on a file basis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with File mirroring drive that mirrors data on a file basis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and File mirroring drive that mirrors data on a file basis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3125476