Supermicro SuperServer SYS-221BT-DNTR - Page 73

73
Chapter 4: Motherboard Connections
UID/BMC Reset Switch and UID_LED/BMC LED Indicator
A UID LED/BMC Reset switch (JUIDB1) is located on the rear I/O panel of the motherboard.
This switch has dual purposes. It can be used as a unit identier (UID) for the user to identify
a system unit that is in need of service, and it can also be used to reset the BMC settings.
When functioning as a BMC reset switch, JUIDB1 will trigger a cold reboot when the user
presses and holds the switch for 6 seconds. It will also restore the BMC settings to the
manufacturer defaults when the user presses and holds the switch for 12 seconds.
When functioning as a UID LED switch, JUIDB1 will turn on and o󰀨 the UID_LED1/LEDBMC
indicator, which works as a UID LED and a BMC Reset LED, when the user presses the
switch on/o󰀨. In addition, UID can also be triggered via BMC on the motherboard.
The UID/BME Reset switch (JUIDB1) works in conjunction with UID_LED1/LEDBMC LED
indicator to achieve dual purposes for unit identication and BMC reset. Refer to the BMC
User's Guide posted on our website at http://www.supermicro.com for more information.
UID/BMC Reset Switch (JUIDB1)
Pin Denitions
Pin# Denition
1 Ground
2 Ground
3 Button In
4 Button In
UID/BMC Reaset Switch (JUIDB1)
Features & Settings
When Used as a UID LED Switch When Used as a BMC Reset Switch
UID_LED1/LEDBM acting as a rear UID LED
indicator
UID_LED1/LEDBMC acting as a BMC Reset LED indicator.
UID_LED1/LEDBMC: Blue: Unit in need of
services is identied
UID_LED1/LEDBMC: Green Blinking: BMC (BMC Heartbeat) Normal
BMC Reset: Press
& hold the switch
(JUIDB1) 6 seconds
UID_LED1/LEDBMC: Solid green during reboot
Press the switch (JUIDB1) on/o󰀨 to turn on/
o󰀨 both rear UID LED (located at UID_LED1/
LEDBMC LED) and front UID LED (located
on the front control panel) for UID indications
Triggering a cold reboot; the UID_LED1/LEDBMC
indicator: Solid green on during cold reboot
BMC Reset: Press
& hold the switch
(JUIDB1) 12 seconds
UID_LED1/LEDBMC: Solid green during BMC reset
BMC: Reset to the manufacturer default; UID_LED1/
LEDBMC: Solid on during BMC Reset