A technique maps the capacity of storage devices, such as disks, into any RAID group of a volume of a storage system regardless of the location of the RAID group within a volume block number (VBN) space of the volume. The technique separates disks and mapped VBN ranges, allowing for flexibility in the...http://www.google.fr/patents/US7111147?utm_source=gb-gplus-shareBrevet US7111147 - Location-independent RAID group virtual block management
Location-independent RAID group virtual block management
