Front backplane LEDs and rear drive LEDs
This topic offers the status of LEDs on the front backplane, and rear drives LEDs showing via light pipes.
LEDs on the front backplane
Figure 1. LEDs on the front backplane
| 1 Drive status LED | 2 Drive activity LED |
| 3 CPLD heartbeat LED |
1 Drive status LED 2 Drive activity LED
| Drive Status | 1 Drive status LED (Orange) | 2 Drive activity LED (Green) |
|---|---|---|
| The drive is not present. | Off | Off |
| The drive is present but not active. | Off | On |
| The drive is present and active. | Off | Blinking (4 Hz) |
| Locating the drive. | Blinking (4 Hz) | On |
| A drive fault happens. | On | On |
| The drive is being rebuilt. | Blinking (1 Hz) | Blinking (1 Hz) |
3 CPLD heartbeat LED
The CPLD heartbeat LED helps you identify the power and health status of the system board. There is another CPLD heartbeat LED on DC-SCM, see LEDs and buttons on Datacenter Secure Control Module (DC-SCM).
| 3 CPLD heartbeat LED (Green) | |
|---|---|
| Status | Description |
| Blinking (about one flash per second) | CPLD is working normally. |
| Blinking at other speeds or always on | CPLD is at the initial phase or is working abnormally |
| Off | CPLD is not working |
Rear drive LEDs
Communicating through the light pipes, each drive comes with a window for an activity LED and a status LED. Different colors and speeds indicate different activities or status of the drive. The following illustrations and tables describe the problems that are indicated by the activity LED and the status LED.
Figure 2. Rear drive LEDs
| Drive Status | 1 Drive status LED (Orange) | 2 Drive activity LED (Green) |
|---|---|---|
| The drive is not present. | Off | Off |
| The drive is present but not active. | Off | On |
| The drive is present and active. | Off | Blinking (4 Hz) |
| Locating the drive. | Blinking (4 Hz) | On |
| A drive fault happens. | On | On |
| The drive is being rebuilt. | Blinking (1 Hz) | Blinking (1 Hz) |
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