Storage subsystem and back-up/recovery method
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United States of America Patent
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Apr 6, 2010
Grant Date -
Mar 6, 2008
app pub date -
Nov 13, 2006
filing date -
Sep 6, 2006
priority date (Note) -
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Abstract
One or more random access-type storage devices comprise a volume group and a journal volume. The volume group contains a volume pair configured from a primary volume and a secondary volume. Whenever data is received from a host device, this received data is written in the primary volume, a journal containing the write sequence of the data and the data is produced, and the journal is written in a journal volume. A plurality of journals accumulated in a journal volume are written in a sequential access-type storage device. Based on the write sequence recorded in each of the plurality of journals recorded in the sequential access-type storage device, the data of the journals is restored to the primary volume for storing the data and to a secondary volume from which the volume pair is configured.
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