1. Installing Internal Optional DevicesExpress5800/R120d-2E User’s Guide 53Chapter 2 Preparations1.4 Confirming Servers (UID Switch)Using the UID switch helps you to identify the target server.When the server is working or before you turn the server off or disconnect a cable from the server, be sure toidentify the target server by using the UID switch first.If UID (Unit ID) switch is pressed, UID LED will be on or flash. If it is pressed again, the LED will be off.16x 2.5-inchhard disk drive model26x 2.5-inch hard disk drive modelUID switchUID switch
