The TowerRAID TR8U is an 8-bay storage enclosures for high capacity storage needs. With built-in ventilating protective screen front panel, both units utilize cable-less backplane-design to support up to eight hard drives. Hard drives are installed on easy access hard drive trays for simple insertion and removal. Hard drive cooling is provided by a large 4.7" cooling fan located on the back of the units. The TR8U features JBOD mode for individual hard drive access. In addition to JBOD, both units support three different spanning modes, including 1 spanning set for 8 hard drives per set, 2 spanning sets for 4 hard drives per set, and 4 spanning sets for 2 hard drives per set. Storage modes could be selected via an easy access dip switch located on the back panel. Both units are environmental friendly with Auto-Power option, where the unit powers on only when the connected computer is on. Units are available in black (TR8U-B) and silver (TR8U) finish.