Snapshot copy of data volume during data access
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United States of America Patent
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N/A
Issued Date -
Jul 15, 2004
app pub date -
Oct 10, 2003
filing date -
Jun 5, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A computer system with read/write access to storage devices creates a snapshot of a data volume at a point in time while continuing to accept access requests to the mirrored data volume by copying before making changes to the base data volume. Multiple snapshots may be made of the same data volume at different points in time. Only data that is not stored in a previous snapshot volume or in the base data volume are stored in the most recent snapshot volume.
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