Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2011-04-19
2011-04-19
Thomas, Shane M (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S165000, C711SE12091
Reexamination Certificate
active
07930502
ABSTRACT:
A disk array apparatus capable of effecting saving and operation of data through a simple construction. When a host computer sets “write inhibit” or “read/write inhibit” for an LDEV which is set on a first storage device, this setting is registered in an access attribute management table and is also reflected onto a migration management table. A migration control program moves the LDEV for which access limitation has been set to a lower-speed (lower-performance) second storage device or to an external storage device. When the access limitation is released, the moved LDEV is restored to the first storage device from the storage device to which the LDEV has been moved. By performing migration control in interlocking relation to control of access attributes, it is possible to obtain a simple data saving function and data management function.
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Nakamura Yasuaki
Shimada Akinobu
Brundidge & Stanger, P.C.
Hitachi , Ltd.
Thomas Shane M
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