Backup and restore operations are made possible in a storage system that has dynamic chunk allocation (DCA) capability. In a DCA storage system, a chunk of physical storage area is not allocated to a segment of a volume until a write command is received targeting the segment of the volume. During a restore...http://www.google.de/patents/US8117409?utm_source=gb-gplus-sharePatent US8117409 - Method and apparatus for backup and restore in a dynamic chunk allocation storage system
