Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2005-05-23
2008-10-28
Thai, Tuan V. (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S100000, C711S154000, C711S161000
Reexamination Certificate
active
07444485
ABSTRACT:
Method and apparatus for performing logical duplication of backup data in a computer system including a host computer, a storage device storing data for the host computer, and at least one computer-readable backup storage medium storing backup data copied from the storage device, is disclosed. In one embodiment, a method copies only a subset of the backup data onto at least one computer-readable duplicate backup storage medium as duplicate backup data so that the duplicate backup storage medium is not an exact duplicate of the at least one backup storage medium. For example, in one embodiment, in which the backup data includes a plurality of work items, a subset of the work items are copied onto the at least one duplicate backup storage medium. Method and apparatus for restoring backup data of interest from duplicate backup storage media are also disclosed.
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McBride Peggy A.
Miller Glenn E.
St. Pierre Edgar J.
Chen Theodore A.
EMC Corporation
Gupta Krishnendu
Thai Tuan V.
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