System and method for restoring a virtual disk from a snapshot

Details System and method for restoring a virtual disk from a snapshot System and method for restoring a virtual disk from a snapshot

2006-06-07

2010-06-22

Lewis, Cheryl (Department: 2167)

Data processing: database and file management or data structures

File or database maintenance

Database recovery

C707S831000

Reexamination Certificate

active

07743035

ABSTRACT:
A method for restoring a virtual disk (vdisk) in an active file system to an earlier time is described. Pointers pointing to data represented by the virtual disk are maintained. The pointers are saved to persistent storage at the earlier time. A pointer at a later time is compared with the pointers saved at the earlier time. If the pointer from the later time matches the pointer saved at the earlier time, the pointer from the later time is kept in the active file system. If the pointer from the later time does not match the pointers saved at the earlier time, a set of pointers associated with the pointer saved at the earlier time is copied to the active file system.

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