A local imager (202) copies each allocation unit (302) occupied by a file (305) of a file system (102) to a locally-stored image file (204) within the same partition (104) as the file system (102). The allocation units (302) may be compressed as they are copied, resulting in a locally-stored image file...http://www.google.fr/patents/US20050165853?utm_source=gb-gplus-shareBrevet US20050165853 - Method and apparatus for localized protected imaging of a file system
Method and apparatus for localized protected imaging of a file system