Storage control apparatus and storage control method
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United States of America Patent
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Jan 7, 2014
Grant Date -
Dec 20, 2012
app pub date -
Jun 15, 2011
filing date -
Jun 15, 2011
priority date (Note) -
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Abstract
In one of the storage control apparatuses in the remote copy system which performs asynchronous remote copy between the storage control apparatuses, virtual logical volumes complying with Thin Provisioning are adopted as journal volumes to which journals are written. The controller in the one of the storage control apparatuses assigns a smaller actual area based on the storage apparatus than in case of assignment to the entire area of the journal volume, and adds a journal to the assigned actual area. If a new journal cannot be added, the controller performs wraparound, that is, overwrites the oldest journal in the assigned actual area by the new journal.
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