Storage shelves of a mass data storage library are organized into a plurality of subsets for the purpose of conducting an inventory of media stored in the shelves. In response to an inventory command, the inventory is conducted in a predetermined order by subset. Upon completion of the inventory of each...http://www.google.de/patents/US6286079?utm_source=gb-gplus-sharePatent US6286079 - Interruptible inventory of a mass data storage library
