IBM eServer 240 xSeries, User Reference Manual

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Processor Serial Number Access
Select this choice to identify if the microprocessor serial number in the
microprocessor is readable.
Core Chipset Control
Select this choice to modify settings that control features of the core chip set on the
system board. Do not make changes here unless directed to do so by an IBM
authorized service representative.
Cache Control
Select this choice to enable or disable the microprocessor cache. In addition, you
can define the microprocessor cache type as write-back (WB) or write-through
(WT). Selecting write-back mode will provide the maximum system performance.
PCI Slot/Device Information
Select this choice to view and identify system resources used by PCI devices. PCI
devices automatically communicate with the server configuration information. This
usually results in automatic configuration of a PCI device. If a conflict does occur,
see “Resolving configuration conflicts” on page 30.
Use the Up or Down Arrow key to highlight the assignment that you want to
change, and press Enter. Use the Left or Right Arrow key to select from the list of
available choices. An asterisk (*) indicates that more than one device shares a
slot. After making changes, you can select:
Save and exit the PCI Utility to save the changes and return to the Advanced
Setup choice.
Exit the PCI Utility without saving changes to ignore the changes, restore
the previous settings, and return to the Advanced Setup choice.
Note: You can use the menu selections to save settings or restore settings for the
PCI Slot/Device Information choice only. The Configuration/Setup Utility
main menu selections save settings, restore settings, or load default
settings for all other choices, but not the PCI Slot/Device Information choice.
Your server uses a rotational interrupt technique to configure PCI devices.
Because of this technique, you can install a variety of PCI devices that currently do
not support sharing of PCI interrupts (IRQs). Multiple-function PCI devices use
more than one interrupt.
Selecting PCI Device Control allows you to enable or disable the system board
SCSI, video, and Ethernet controllers and the PCI slots.
The default setting is Enable for all the controllers and PCI slots. If you select
Disable, the disabled device will not be configured and will be invisible to the
operating system. This is equivalent to unplugging the device.
If the on-board SCSI controller is disabled and no other controller and mass
storage device are installed, operating-system startup cannot occur.
If the video controller is disabled and no video adapter is installed, the server
will have no video capability. However, turning the server off and on three
times results in a default startup that enables video again.
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IBM xSeries User's Reference