4U, Storage JBOD Chassis with capacity 24 x 3.5" hot-swappable HDDs bays, Dual Expander Backplane Boards support SAS3/2 HDDs with 12Gb/s throughput, 8 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, 1000W (1+1) 96% efficient Titanium level power supplies, 5 hot-plug redunda