Netgear RN3138 – Rackmount ReadyNAS Storage Hardware Manual

The UI (Unit Identifier) LED indicates these states:

Blue. Software or manual identification is on.

Off. Identification is not requested by software or manually when the UI
button is pressed.
Pressing the UI button on either the control panel or the rear panel toggles
the UI LEDs on the control panel and the rear panel. Use this in a situation
such as a densely populated rack when you are working from both the front
and back of the server.

UI LED (rear panel)

Two LED status indicators are built into each LAN port. One LED is green and
one is amber. They indicate port speed and activity as follows:

Green on, amber off. 1000 Mbps connection speed, no activity.

Green blinking, amber off. 1000 Mbps connection speed, activity.

Green off, amber on. 10 Mbps or 100 Mbps connection speed, no activity.

Green off, amber blinking. 10 Mbps or 100 Mbps connection
speed, activity.

Green off, amber off. No connection.

LAN port LEDs (rear panel)

This section describes how to power on and shut down your system. If you must shut down the system, use
one of the preferred shutdown methods whenever possible.

Connect the system to a power supply.

Depending on the system's last power state, the system might power on automatically.
For more information, see 

 on page 30.

If necessary, press the Power button on the front panel of the system.

The system powers on.

You can gracefully shut down your system by using the Power button or the ReadyNAS local admin page.