Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2004-03-02
2008-09-02
Shah, Sanjiv (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S141000, C711S161000, C707S793000, C707S793000
Reexamination Certificate
active
07421549
ABSTRACT:
A system and method for synchronizing remote copies within a multiple storage network apparatus, incorporates the steps of receiving a plurality of timestamps, comparing the timestamps with a plurality of timestamps stored in a remote copy table, updating a synchronize time value stored by a synchronized time parameter, and receiving a synchronized time stamp, wherein the value associated with the received timestamp is ulterior to the value of the synchronized time stored by the synchronized time parameter. Further, a system and method for synchronizing secondary storage subsystems, incorporates the steps of collecting a plurality of synchronous timestamps from a plurality of secondary storage subsystems, comparing the plurality of collected synchronous timestamps with a synchronize time parameter, updating a remote copy time table, issuing a remote copy queue request, receiving status information about a secondary storage subsystem starting host, and synchronizing the secondary storage subsystem.
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A. Marquez, Esq. Juan Carlos
Campos Yaima
Fisher Esq. Stanley P.
Hitachi , Ltd.
Reed Smith LLP
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