The list of colors below helps you identify the general status of your NAS:

The front and rear LEDs indicate drive status and activity. This section describes the behavior of the LED indicators. Note that even if you have turned off the front LED using Device Manager > Settings, events triggering a red light will always cause the front LED to turn on.

Front LED Color	Rear LED Color	State
Blinking blue	Activity LED for working disks (until they are fully initialized)	Occurs as the device is booting
Solid blue	Activity LED for working disks	Device is functioning properly and the drives are working
Blinking blue/red	Blinking blue/red	RAID synchronizing
	Activity LED for working disks	Operating system update in progress
Blinking red	Solid red for non-functional disk(s)	RAID is degraded; data is intact but the array is no longer protected should another disk fail
	Activity LED for all disks	Temperature alert
		Fan is not spinning
		The NAS is receiving power via a connected UPS
Solid red	Activity LED for working disks	Temperature alert (critical level) – the product is preparing to power off
		The power supply has been cut and the UPS has run out of reserve power; the product is preparing to shut off
	Solid red for non-functional disks	RAID has failed and data has been lost
	Off for disconnected disks	Disks are disconnected

5big NAS Pro only: When the the product is operating, a short push of the on/off button will turn the 5big NAS Pro off.

5big NAS Pro only: A long push of more than four seconds cuts the power from the 5big NAS Pro, forcing it to shut down immediately. A long push can result in data loss and should only be used when a short push does not work.

LaCie 2big NAS: The front LED button can be used in tandem with the ON/OFF switch to revert the device to its factory settings (see Reset to Factory Conditions: 2big NAS).

LaCie 5big NAS Pro: The front LED button can be used in tandem with the reset button on the rear of the device to launch the LaCie NAS Rescue (see LaCie NAS Rescue: 5big NAS Pro).