Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2009-08-10
2011-12-20
Rojas, Midys (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S004000, C711S112000
Reexamination Certificate
active
08082394
ABSTRACT:
The object of the present invention is to prevent distribution of a storage range to a volume from an inappropriate disk drive based on use of the volume as a result of an automatic extension of a volume capacity. A computer system has a storage system including a physical storage device, a host computer, and a management computer. The storage system includes a plurality of kinds of physical storage devices physically dividing into two segments or more the volume and records as constitution information the correspondence between each segment and the volume using the segment. And the storage system records the kind of physical storage device to be allocated to the volume and selects the physical storage device according to the kind of stored physical storage device for allocation of the segment when the host computer performs an I/O access to the volume. Access frequency is monitored and data is copied based on the monitored access frequency.
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Asano Masayasu
Nagai Takayuki
Yamamoto Masayuki
Hitachi , Ltd.
Mattingly & Malur, PC
Rojas Midys
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