A method and apparatus for method for transferring files between a primary storage system and a backup and restore system is described. The system generates collapsed extents which are used to specify data to be backed up to a backup and restore system. The backup and restore system backs up data based...http://www.google.fr/patents/US7337289?utm_source=gb-gplus-shareBrevet US7337289 - Method and apparatus for computing file storage elements for backup and restore
Method and apparatus for computing file storage elements for backup and restore