4U rackmount disk array storage chassis. Combined with BPU or T Series hard drive cages provides up to fifteen 3.5 in. SATA/SAS hard drives capability for -1/0/-5/-6/JBOD RAID configuration. One ball bearing 120 mm. fan offers long lasting and enhanced thermal cooling solution. provides maximum storage and performance to high density storage system. Features. 120 mm. x1 Cooling fan. Power and HDD LED. Power and alarm reset switch. Storage PS/2 AT power supply option. Optional Hot-swappable HDD Cage. Up to 15 hard drives capacity with 's BPU and BPN Series Specifications. Standard Drive Bays - 5.25 in. Drives: 9. Indicators - LEDs for Power On/Off and HDD. Switches - Power On/Off and Reset. Expansion Slots - 6. Material of Main Chassis - Chassis: 1.2 mm. SECC Zinc-Coated Steel. Color of Main Chassis - Black. Cooling Fan - 1 x 120 mm. Dimension - 25 x 23 x 12 in.