METHODS AND APPARATUS FOR POINT-IN-TIME VOLUMES
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United States of America Patent
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Apr 9, 2013
Grant Date -
Mar 29, 2012
app pub date -
Aug 25, 2011
filing date -
Jan 10, 2001
priority date (Note) -
Granted
status (Latency Note)
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Abstract
Methods and apparatus for point-in-time volumes are provided. A relationship is enabled between a source volume and point-in-time volume. Copying a data chunk to the point-in-time volume before a write operation modifies the data chunk on the source volume dynamically creates the point-in-time volume. The point-in-time volume can be accessed in read/write mode as a general purpose data storage volume. Other embodiments comprising additional features, such as a forced migration process, are also provided.
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