4U rackmount design.24x hot-swappable SATA II, III/SAS 6G drive bays.Built in 6Gb/s SAS Expander for single SFF-8088 cable connectivity, LSISAS2x36/28 expander IC embedded.System status indication through LCD, LED (Link status and Activity) and alarm buzzer.LED indicators for power and activity on each HDD trayBackplanes are horizontal mounted for better ventilationRoHS CompliantOS IndependentCome with full range redundant power supplyOptional Data Cable: SFF-8088 cableRail Option:RL-26Drive Bay: 24 x hot-swappable SATA II, III/SAS 6G drive baysCooling Fan: 3 x 80mm rear fansConnector:One SFF-8088 "IN" connector for connection to the host, two SFF-8088 "OUT" connectors for expansion to an additional JBOD enclosureO.S. support:OS IndependentPower Supply Options: Come with 800w redundant power supplyDimensions ( W x D x H ): 19" x 18.9" x 7.0" (483mm x 480mm x 176mm)Packing:Double boxesWeight (without hard drive): 17.2 kg/38 lb (NET) 18.6 kg/41 lb (GROSS)Environment Temperature:0/40 °C, 32/104 °F (Operating) -20/60 °C, -4/140 °F (Non-Operating)Relative Humidity: 5% to 95%,non-condensing