2U, Storage JBOD Chassis with capacity 12 x 3.5" hot-swappable HDDs bays, Single Expander Backplane Boards support SAS3/2 or SATA3 HDDs with 12Gb/s throughput, 4 x Mini-SAS HD ports for Internal / External Cascading Expander Combination for high performance, high availability or high redundancy requirements, 1x IPMI port for Remote System Power on/off and system monitoring, Support NTP for time synchronization & RTC battery backup, 740W (1+1) 95% efficient Platinum level power supplies, 3 x 80mm