Supermicro SUPERSERVER 2028TP-HC0R-SIOM, User Manual

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Chapter 5: Advanced Serverboard Setup
5-17 5-16
SUPERSERVER 2028TP-HTR/HC0R/HC1R-SIOM USER'S MANUAL
5-9 Jumper Settings
Explanation of Jumpers
To modify the operation of the serverboard,
jumpers can be used to choose between
optional settings. Jumpers create shorts
between two pins to change the function
of the connector. Pin 1 is identified with
a square solder pad on the printed circuit
board. See the diagram at right for an
example of jumping pins 1 and 2. Refer to the
serverboard layout page for jumper locations.
Note: On two-pin jumpers, "Closed" means
the jumper is on and "Open" means the
jumper is off the pins.
Connector
Pins
Jumper
Setting
3 2 1
3 2 1
JBT1 contact pads
CMOS Clear
JBT1 is used to clear CMOS, which will also clear any passwords. Instead of pins,
this jumper consists of contact pads to prevent accidentally clearing the contents
of CMOS.
To Clear CMOS
1. First power down the system and unplug the power cord(s). It is also
recommended that you remove the onboard battery from the serverboard.
2. With the power disconnected, short the CMOS pads with a metal object such
as a small screwdriver.
3. Remove the screwdriver (or shorting device).
4. Reconnect the power cord(s) and power on the system.
Note: Do not use the PW_ON connector to clear CMOS.
Watch Dog Enable/Disable
Watch Dog (JWD1) is a system monitor
that can reboot the system when a
software application hangs. Close pins
1-2 to reset the system if an application
hangs. Close pins 2-3 to generate
non-maskable interrupt signals for the
application that hangs. See the table on
the right for jumper settings. Watch Dog
must also be enabled in the BIOS.
Watch Dog
Jumper Settings
Jumper Setting Definition
Pins 1-2 Reset
Pins 2-3 NMI
Open Disabled
VGA Enable
Jumper JPG1 allows the user to enable
the onboard VGA connectors. The
default setting is pins 1-2 to enable the
connection. See the table on the right for
jumper settings.
VGA Enable
Jumper Settings
Jumper Setting Definition
Pins 1-2 Enabled
Pins 2-3 Disabled
BMC Enable
Jumper JPB1 allows you to enable the
onboard BMC (Baseboard Management
Controller) to provide IPMI 2.0/KVM
support on the serverboard. Be sure to
remove the power cord before closing
pins 2-3 to disable the BMC. See the
table on the right for jumper settings.
BMC Enable
Jumper Settings
Jumper Setting Definition
Pins 1-2 BMC Enabled
Pins 2-3 BMC Disabled
Manufacturer Mode Select
Close pins 2 and 3 of JPME2 to bypass
SPI flash security and force the system
to operate in the Manufacturer Mode,
which allows the user to flash the system
firmware from a host server for system
setting modifications. See the table on
the right for jumper settings.
ME Mode Select
Jumper Settings
Jumper Setting Definition
Pins 1-2 Normal (Default)
Pins 2-3 Manufacture Mode