Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-09-05
2006-09-05
Sparks, Donald (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
Reexamination Certificate
active
07103737
ABSTRACT:
Disclosed is an apparatus or method performed by a computer system for creating a hierarchy of data volumes. Each data volume in the hierarchy is a point-in-time (PIT) copy of another data volume in the hierarchy or a PIT copy of a data volume V. In one embodiment of the apparatus or method, the contents of a first data volume in the hierarchy can be refreshed to the contents of a second data volume in the hierarchy such that the first data volume becomes a PIT copy of the second data volume. Before the first data volume is fully refreshed to the contents of the second data volume, data of the first data volume can be read or modified.
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Colgrove John A.
Karr Ronald S.
Kekre Anand A.
Kiselev Oleg
Pendharkar Niranjan S.
Campbell Stephenson Ascolese LLP
Rutz Jared
Sparks Donald
VERITAS Operating Corporation
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