Supermicro H12DSG-O-CPU User Manual page 37

Unit Identifier Switch/UID LED Indicator
A Unit Identifier (UID) switch is located on the I/O backplane, and two UID LED indicators are
located on the serverboard. The rear UID LED is located next to the UID switch. The front
UID LED is located on pins 7 & 8 on the front control panel (JF1). When you press the UID
switch, both rear and front UID LED indicators will be turned on. Press the UID switch again
to turn off the LED indicators. The UID Indicators provide easy identification of a system unit
that may be in need of service.
Note: UID can also be triggered via IPMI on the serverboard. For more information on IPMI,
please refer to the IPMI User's Guide posted on our website at http://www.supermicro.com.
NIC1/NIC2 (LAN1/LAN2)
The NIC (Network Interface Controller) LED connection for LAN port 1 is located on pins 11
and 12 of JF1, and the LED connection for LAN Port 2 is on Pins 9 and 10. Attach the NIC
LED cables here to display network activity.
HDD LED/UID Switch
The HDD LED/UID Switch connection is located on pins 13 and 14 of JF1. Attach a cable to
Pin 14 to show hard drive activity status. Attach a cable to Pin 13 to use UID switch. Refer
to the table below for pin definitions.
UID LED
Pin Definitions (JF1)
Pin# Definition
7 UID LED+
8 UID LED-
LAN1/LAN2 LED
Pin Definitions (JF1)
Pin# Definition
9 NIC2 LED+
10 NIC2 LED-
11 NIC1 LED+
12
NIC1 LED-
HDD LED
Pin Definitions (JF1)
Pin# Definition
13 HDD LED+/UID Switch+
14 HDD LED-
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Chapter 2: Installation