Storage control apparatus, data archive method for storage control apparatus, and storage system
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United States of America Patent
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Issued Date -
Apr 16, 2009
app pub date -
Feb 6, 2008
filing date -
Oct 11, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The storage control apparatus of the present invention efficiently shifts data which are stored in a virtual volume from a random access-type storage device to a sequential access-type storage device. The virtual volume is constituted by a plurality of pages. Each page is associated with either a segment of a disk device or a segment of a tape device. Data which have not been accessed by the host are collected in page units in a spare disk device for data migration. The data are copied from the migration source disk device to the migration destination tape device. The segment assignment destination of the page of the virtual volume is changed from a segment in the disk device to a segment in the tape device.
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