A facility is provided for storing in a backup memory only those blocks of a file, or disk partition, which differ from corresponding blocks forming an earlier version of the file. Specifically, a file is divided into a number of blocks and a "signature" is generated for each such block. A block is then...http://www.google.fr/patents/US5559991?utm_source=gb-gplus-shareBrevet US5559991 - Incremental computer file backup using check words
Incremental computer file backup using check words
