System Overview

There are several LEDs on the control panel and on the drive carriers to keep you constantly informed of the overall status of the system.

Control Panel LEDs

Control Panel Button

There are three buttons located on the front of the chassis: a UID button, a reset button and a power on/off button.


Depressing the UID (unit identifier) button illuminates an LED on both the front and rear of the chassis for easy system location in large stack configurations.

The LED will remain on until the button is pushed a second time.

Another UID button on the rear of the chassis serves the same function.

This button has an LED built into it, which will illuminate when either the front or rear UID button is pushed.


This is the main power button, which is used to apply or turn off the main system power.

Turning off system power with this button removes the main power but keeps standby power supplied to the system.


Use the reset button to reboot the system.

Control Panel LEDs

The control panel located on the front of the chassis has five LEDs.

These LEDs provide you with critical information related to different parts of the system.

This section explains what each LED indicates when illuminated and any corrective action you may need to take.


Indicates network activity on LAN2 when flashing.


Indicates network activity on LAN1 when flashing.


Indicates SATA and/or peripheral drive activity when flashing.


Indicates power is being supplied to the system's power supply units. This LED should normally be illuminated when the system is operating.

Information LED

This LED will be solid blue when the UID function has been activated.

When this LED flashes red, it indicates a fan failure.

When red continuously it indicates an overheat condition, which may be caused by cables obstructing the air ow in the system or the ambient room temperature being too warm.

Check the routing of the cables and make sure all fans are present and operating normally.

You should also check to make sure that the chassis covers are installed.

This LED will remain flashing or on as long as the indicated condition exists.

Universal Information LED States

Drive Carrier LEDs

The chassis includes externally accessible SATA drives. Each drive carrier displays two status LEDs on the front of the carrier.

Universal Information LED States