Form Factor 1U M/B Form Factor Extended ATX (12" x 13") Drive Bays RM13310 2.5" Hot-swap: 10 PSU Form Factor 1U Single, 1U 1+1 Redundant Indicators 1 x Power Status 2 x LAN Activity 1 x HDD Status 1 x UID 1 x System Status Front Control 1 x Power On/Off 1 x UID 2 x USB 3.0 System Security Intrusion Switch (Option) Cooling Fans RM13310 Middle: 5 x 40mm (T28mm) (Maximum to T56mm, Up to 6 units) Expansion Slots 1 x Full Height and Half Length HDD Backplane RM13310: 10-Port 12Gb/s Mini-SAS HD Front Bezel Option Item Dimension (L"xW"xH") 26 x 18 x 2