IBPI Spec: LED Blinking Pattern Interpretation
The IBPI standard defines interpretations for both 2 and 3 LED implementations as shown in Figure 3.
| SGPIO-SDATAOUT bit | 2 LEDs per slot | 3 LEDs per slot | |||
|---|---|---|---|---|---|
| Activity LED | Status LED | Activity LED | Locate LED | Fail LED | |
| Drive not present | Off | N/A | Off | N/A | N/A |
| Drive present, no activity | On | N/A | On | N/A | N/A |
| Drive present, activity | 4 Hz | N/A | 4 Hz | N/A | N/A |
| Locate (identify) | 4 Hz | 4 Hz | N/A | 4 Hz | Off |
| Fail | N/A | On | N/A | Off | On |
| Rebuild | N/A | 1 Hz | N/A | Off | 1 Hz |
| Rebuild | N/A | 1 Hz | N/A | Off | 1 Hz |
| Predicted failure analysis | N/A | 2 blinks at 4 Hz, 1 pause at 2 Hz | N/A | N/A | 2 blinks at 4 Hz, 1 pause at 2 Hz |
| Hotspare | N/A | 2 blink at 4 Hz, 1 pause at 0.3 Hz | N/A | N/A | 2 blink at 4 Hz, 1 pause at 0.3 Hz |
| In a critical array | N/A | N/A | N/A | N/A | N/A |
| In a failed array | N/A | N/A | N/A | N/A | N/A |
| Undefined | N/A | N/A | N/A | N/A | N/A |
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