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checksum
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   Also found in: Acronyms, Encyclopedia, Wikipedia 0.01 sec.

checksum

In computing, a control total of specific items of data. A checksum is used as a check that data have been input or transmitted correctly. It is used in communications and in, for example, accounts programs. See also validation.



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The first is calculating a check sum during the backup process, then reading the tape, recalculating the check sum and doing a comparison--they should be equal.
If archived data is restored to the application and any changes are made, Active Archiving will compare the new check sum with the old upon re-archiving, conclude that changes have occurred, and save the newly archived data as a new file.
The VCOM-54 multi-channel communications controller easily manages all frame level transport, including frame interrupt handling, DMA buffer management, and frame check sum error detection.
 
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