In order to eliminate service calls needed to change disk drives, RAID Lite Dual 3.5" Desktop, Six 3.5" Desktop, Rackmount and Data Center System disk drives are mounted in user replaceable drive canisters. Disk drives in the RAID Lite 5.25" Desktop and Tower drives can also be mounted directly to their chassis when using 9GB drives. They can be removed by simply removing two mounting screws, the power cable and the SCSI cable.