Method of and apparatus for taking back-up and checking alteration of data, and computer product
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United States of America Patent
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May 5, 2009
Grant Date -
Sep 2, 2004
app pub date -
Jan 16, 2004
filing date -
Feb 27, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to taking a back-up of original data and deciding whether the original data has been altered. A back-up of the original data is taken by copying the original data from one storing unit to other storing unit as back-up data. Once the copying is over, it is decided whether the original data has been altered based on a comparison between the original data and the back-up data. All the requests for access to the original data received while the original data is being copied are denied but request received while alteration of the original data is being decided are allowed.
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