Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2007-08-07
2007-08-07
Elmore, Stephen C. (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S154000, C711S161000, C711S165000, C714S006130, C714S006130, C714S710000, C707S793000, C707S793000, C707S793000
Reexamination Certificate
active
10801718
ABSTRACT:
When there is a change in a group of volumes managed by a host computer, data duplication processing is immediately carried out against the changed volume. The host computer includes a volume-managing portion, a data duplication-controlling portion which executes the data duplication of data stored in a volume in a main data center, and a data duplication storing portion which stores data necessary for the data duplication. The data duplication-controlling portion compares data held by the volume-managing portion with the data in the data duplication storing portion, and updates the data in the data duplication storing portion based on the data held by the volume-managing portion.
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Goto Sumio
Hiraiwa Yuri
Inoue Taro
Elmore Stephen C.
Hitachi , Ltd.
Kim Daniel
Mattingly ,Stanger ,Malur & Brundidge, P.C.
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