Supermicro SUPERSERVER 6023L-8R, User Manual

Page: 57 / 110

Chapter 5: Advanced Motherboard Setup
5-23
SCSI Enable/Disable
The SCSI Enable/Disable jumper at
JA4 allows you to enable or dis-
able the onboard SCSI. The nor-
mal (default) position is on pins 1-
2 to enable SCSI. See the table on
the right for jumper settings.
Jumper
Position
Pins 1-2
Pins 2-3
Definition
Enabled
Disabled
SCSI Enable/Disable
Jumper Settings
(JA4)
SCSI Termination Enable/
Disable
Jumpers JPA1 and JPA2 allow you
to enable or disable termination for
the SCSI connectors. Jumper JPA1
controls SCSI channel A and JPA2
is for SCSI channel B. The default
setting is open to enable (terminate)
both SCSI channels. See the table
on the right for jumper settings.
Jumper
Position
Open
Closed
Definition
Enabled
Disabled
SCSI Channel T ermination
Enable/Disable
Jumper Settings
(JPA1, JPA2)
PCI-X Bus Speed Setting
Jumper P2 is used to change the
speed of the single PCI-X bus on
the motherboard. See the table on
the right for jumper settings.
Note : The PCI-X bus is also tied to
the SCSI controller. If using a 33/66
MHz PCI card in this slot, you will
slow the SCSI speed down to 33 or
66 MHz.
PCI-X Slot Bus Speed Settings
Pin Definitions
(P2)
Pin
Setting
Pins 1-2
Pins 2-3
Pins 3-4
Pins 4-5
Speed
PCI 33/66 MHz
PCI-X 66 MHz
PCI-X 100 MHz
PCI-X 133 MHz
(*This slot was designed for
use with PCI-X cards - some
PCI cards may work in the
slot.)
Front Side Bus Speed
JP12 is used to set the system
(front side) bus speed for the pro-
cessors. It is best to keep this
jumper set to Auto. See the table
on the right for jumper settings.
Jumper
Position
Pins 1-2
Pins 2-3
Open
Definition
Auto
400 MHz
533 Mhz
Front Side Bus Speed
Jumper Settings (JP12)