HDD Interface: 24 x 2.5" SAS SSD/HDD or SATA SSD (drives not included)
LEDs: Power indicator
Drive status indicator
Status indicator
Alert indicator
Expansion unit ID indicator
SAS IN port and indicator
SAS OUT port and indicator
Serial ATA (SATA): 4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug*
* M2_2 and SATA3_3 share lanes. If either one of them is in use, the other one will be disabled.