Abstract: Implementations generally relate to storage systems. In one implementation, a system includes a plurality of storage libraries that store a plurality of removable media units. The system also includes a plurality of head units for reading and writing to one or more of the removable media units. The system also includes a plurality of robots that transfer one or more of the removable media units between one or more of the storage libraries and one or more of the head units. The system also includes enabling one or more of the robots to recover a set of data from two or more of the removable media units if a failure occurs in association with at least one of the other removable media units.

Abstract: Implementations generally relate to storage systems. In one implementation, a system includes a plurality of storage libraries that store a plurality of removable media units. The system also includes a plurality of head units for reading and writing to one or more of the removable media units. The system also includes a plurality of robots that transfer one or more of the removable media units between one or more of the storage libraries and one or more of the head units. The system also includes enabling one or more of the robots to recover a set of data from two or more of the removable media units if a failure occurs in association with at least one of the other removable media units.

Abstract: The invention concerns a disk-changing unit comprising a tower housing (1) in which is fitted at least one interchangeable disk magazine (13), at least one disk drive (14), if necessary a disk-loading/ejecting drawer (12), a transporting device (17) for moving a disk between the disk magazine (13), the disk drive (14) and if necessary the disk-loading/ejecting drawer (12), an operating device (6) and a computer-controlled control unit (9). To be able to assemble the disk-changing unit individually with the disk magazine (13), the disk drive (14) and if necessary the disk-loading/ejecting drawer (12), the disk magazine (13), the disk drive (14) and the disk-loading/ejecting drawer (12) have the same external dimensions and are modulatively fitted next to each other by being pushed in or pulled out of corresponding recesses (10) and can thus be interchanged, replaced an/or added to.