HighPoint RocketRAID 4310 - Manual (Page 12)

1.2 – RocketRAID 4320 Adapter layout
Port1- Port2 - These represent the RocketRAID 4320’s 2 Internal Mini-SAS ports.
Each port can directly support up to 4 SAS/SATA hard disks.
J9,J10,J11,J12
J9,J10 are Disk Activity LED’s; J11,J12 are Disk Failure LED’s.
Pin - SAS/SATA channel/port stable:
12