Computer system, storage system and method for extending volume capacity
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United States of America Patent
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Dec 20, 2011
Grant Date -
Dec 3, 2009
app pub date -
Aug 10, 2009
filing date -
Sep 2, 2005
priority date (Note) -
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status (Latency Note)
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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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