File-level continuous data protection with access to...

Data processing: database and file management or data structures – File or database maintenance – Database backup

Reexamination Certificate

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Details

C707S679000

Reexamination Certificate

active

08005797

ABSTRACT:
A system for continuous data protection includes a storage device and a backup storage device. The continuous data protection procedure is performed as two parallel processes: creating an initial backup by copying a data as a file/directory from the storage device into the backup storage device, and copying the data to be written to the data storage as a part of a file/directory into the incremental backup. When a write command is directed to a file system driver, it is intercepted and redirected to the backup storage, and the data to be written in accordance with the write request, is written to the incremental backup on the backup storage. If the write command is also directed to a data (a file/directory) that has been identified for backup, but has not yet been backed up, the identified data (a file/directory) is copied from the storage device to the intermediate storage device. Then, the write command is executed on the identified file/directory on the storage device and the file/directory is copied from the intermediate storage device.

REFERENCES:
patent: 5604862 (1997-02-01), Midgely et al.
patent: 5608865 (1997-03-01), Midgely et al.
patent: 6684229 (2004-01-01), Luong et al.
patent: 2003/0177306 (2003-09-01), Cochran et al.
patent: 2005/0027956 (2005-02-01), Tormasov et al.
patent: 2007/0260830 (2007-11-01), Faibish et al.
patent: 2008/0140963 (2008-06-01), Thomason et al.

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