2-4 General Description9 UID (Unit ID) switchPress the UID switch to turn on/off the UID LED. Pressing the switch once turns on the LED.Pressing it again turns it off.10 POWER switchThe POWER switch is used to turn the power of the server ON/OFF. If you press this switchonce, the power is turned on with the POWER LED going on green. If you press the switchagain, the power is turned off with the LED going off. Keep pressing the switch for 4 secondsor more forcibly shuts down the system. This switch can be used as a SLEEP switch if the OSsupports sleep feature. In SLEEP Mode, this LED blinks.11 NMI (DUMP) switchPress this switch to dump system memory. In normal operation, this switch is not used.12 Hard disk drive baysUp to three hard disk drives can be installed in the bays. The last-digit number indicates thechannel number. In the standard configuration, the dummy sponge blocks are installed in allthe bays.13 DISK LED (green/amber)LED on the hard disk drive. Each LED is green during access to the hard disk drive. The LEDturns amber when the hard disk drive fails. The LED blinks green and amber alternatelyduring rebuild processing (in disk array configuration).