Method, system, and program for data synchronization between a primary storage device and a secondary storage device by determining whether a first identifier and a second identifier match, where a unique identifier is associated with each portion of data
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United States of America Patent
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Jan 12, 2010
Grant Date -
Jun 7, 2007
app pub date -
Oct 10, 2006
filing date -
Sep 25, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a technique for data synchronization. A first identifier for a portion of data on a primary volume is determined, wherein a unique identifier is associated with each portion of data at the primary volume. A second identifier for a portion of corresponding data at a secondary volume is determined, wherein a unique identifier is associated with each portion of data at the secondary volume. The first and second identifiers are compared. When the first and second identifiers do not match, the portion of corresponding data at the secondary volume in a storage device is replaced with the portion of data at the primary volume.
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