Storage system comprising plurality of storage system modules
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United States of America Patent
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Feb 4, 2014
Grant Date -
Oct 8, 2009
app pub date -
May 30, 2008
filing date -
Apr 7, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A plurality of modules (1) and (2) comprise a plurality of virtual volumes with which the same volume identification number is associated. A module (2), which receives a write request from a computer, searches for an unallocated real area from among a plurality of real areas in the module (2) rather than from among a plurality of real areas in the other module (1) if a real area has not been allocated to a write-targeted virtual area in accordance with the write request. The module (2) allocates the real area retrieved from the module (2) to the write-targeted virtual area, and writes data according to the write request to this real area.
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