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The LEDs help you identify the status of the system and drives.

| LED behavior | System status |
|---|---|
| Off | Device is powered off |
| Solid blue | Device is connected to host |
| Blinking blue | Device is booting |
| Slow blinking blue, 10 second interval | Device is in power-saving mode |
| Fast blinking blue | Device is starting up or shutting down |
| Blinking red and blue | RAID is being initialized or synced |
| Blinking red, 1 second interval | Temperature warning or RAID degraded |
| Solid red | Temperature critical, fan not connected, or RAID broken |
| LED behavior | Drive status |
|---|---|
| Solid blue | Drive is ready |
| Blinking blue | Drive is being accessed (normal operation) |
| Solid red | Drive is faulty |