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## Turn Identifier Light On or Off

This action brings up a dialog box to turn identifier lights on drives or library controller cards on and off.

UID (Unit Identification) LED generally refers to the blue LED's on the tape library that assist users and service personnel in determining which component requires attention.

Two groups of UID LEDs' are in the TS4300 tape library

- Drives (one LED per drive)
- Base and expansion controller (one LED per controller)

Additionally there is one UID LED on the Operator Panel. Control of this LED is linked to the base controller UID LED. If the base controller is selected and its UID LED is switched on, the Operator Panel UID LED ia turned on as well.

To select and switch on UID LEDs:

1. Expand the Component Drive or Component Module list, if necessary, by clicking the down arrow on the left side.
2. Select the component where you want to turn on the UID LED.
3. Click Switch LED's On

Use Switch LED's Off if you want to switch off UID LED's.