3.5" Hot swap: 24, 

Lnternal 2.5: 2,

2.5" Hot swap (Option): 2

1+1 Redundant

1 * Power Status, 2 * LAN Activity, 1 * UID Status, 

1 * HDD Status, 1 Warning Status

Power On/Off, System Reset,  2 x USB 3.0

Middle: 4 x 80 mm (T=38 mm)&15000 PWM,

Middle: 4 x 80 mm (T=56 mm)&15000 PWM, (Option)

24pie TO 16pie and 8pice (Option),  24pieTO 3 * 8x (Option),

8654 TO 8x (Option)

24 port12Gb/s SAS, Expander;

(Option), 

2-port NVME (Option)

2-port 12GB (Option)