| Number | Item | Description |
|---|---|---|
| 1 | PATH 0 connector | Connect to a drive tray. |
| 2 | PATH 1 connector | Connects to a drive tray. |
| 3 | STATUS LED |
Green: Back-end module is in the power-on state. Red: Back-end module can be removed safely. |
| 4 | PORT LED | Blue: Link status is normal. |