Snapshot reconstruction from an existing snapshot and one or...

Details Snapshot reconstruction from an existing snapshot and one or... Snapshot reconstruction from an existing snapshot and one or...

2005-12-27

2005-12-27

Nguyen, T (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S112000, C711S114000, C711S161000

Reexamination Certificate

active

06981114

ABSTRACT:
A deleted snapshot of a data volume may be reconstructed from an existing snapshot and one or more modification logs. For example, modifications to the data volume that occur subsequent to creation of a first snapshot may be logged in a modification log. If the first snapshot is deleted, the first snapshot may be reconstructed by modifying a second snapshot, created after the first snapshot, according to the modification log in order to undo any modifications made to the data volume prior to creation of the second snapshot and after creation of the first snapshot.

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