Setting the system board jumpers

The system board has three jumpers. Each of these jumpers has a specific function described in the sections below.

The CMOS Clear jumper

The CMOS (complimentary metal-oxide semiconductor) Clear jumper on the system board (pins 1 through 3 of jumper J9F2) lets you clear all BIOS Setup settings, protect them, or place them under control of the BMC. (See the figure on page 13 for the location of the jumper.)

The following table shows the settings required to perform those tasks. Make sure you turn off the server and unplug the power cord before moving the jumper.

ModeJumperAction When Set

 

 

Setting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CMOS protected

 

 

 

 

 

 

 

 

Normal operation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pins 1-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clear CMOS

 

 

 

 

 

 

 

 

Causes the server to clear all

 

 

 

 

 

 

 

 

 

 

BIOS settings and return to

 

 

 

 

 

 

 

 

 

 

 

 

Pins 2-3

defaults

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Caution

 

Moving the jumper while the power is on can damage your

 

 

server. Always turn off the server and unplug the power

 

 

cord(s) from the server before changing the jumper.

 

 

 

 

 

 

 

 

 

 

 

 

114Using the BIOS Setup Utility