Supermicro 1027R-73DAF, User Manual

Page: 71 / 124

Chapter 5: Advanced Serverboard Setup
5-23
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 con-
nector. Pin 1 is identifi ed with a square
solder pad on the printed circuit board.
See the serverboard layout pages for
jumper locations.
Note: On a two-pin jumper, "Closed"
means the jumper is on both pins and
"Open" means the jumper is either on
only one pin or completely removed.
Connector
Pins
Jumper
Setting
3 2 1
3 2 1
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).
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.
SAS Enable
Jumper JPS1 allows the user to en-
able onboard LSI SAS support. The
default setting is on 1-2 to enable all
SAS ports. See the table on the right
for jumper settings.
SAS Enable/Disable
Jumper Settings
Jumper Setting Defi nition
1-2 Enabled (Default)
2-3 Disabled