IBM 8685 Hardware Maintenance Manual - Page 24

Boot Fail Count, PCI Bus Control

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Page 24 highlights

The server uses a startup sequence to determine the device from which the operating system is loaded. For example, you can define a startup sequence that checks for a startable diskette in the diskette drive, then checks the hard disk drive in bay 1, and then checks a network adapter. You can set the Planar Ethernet PXE/DHCP menu choice to enable or disable the Preboot eXecution Environment (PXE) option for the integrated Gigabit Ethernet controller. The default setting for this menu item is Planar Ethernet, which enables the PXE option. To disable this option, select Disabled. If the Boot Fail Count choice is enabled, you can restore the BIOS system defaults after three consecutive boot failures. If this choice is disabled, the BIOS system defaults can be loaded only from the Configuration/Setup Utility main menu. You can enable a virus-detection test that checks for changes in the master boot record at startup. v Advanced Setup Select this choice to change values for advanced hardware features, such as cache control, PCI configuration, Hot Spare Memory, and Hyper-Threading technology. This choice appears only on the full Configuration/Setup Utility main menu. A warning message appears above the choices on this menu to alert you that the system might malfunction if these options are configured incorrectly. Follow the instructions on the screen carefully. - System Partition Visibility Select this choice to indicate whether the System Partition is visible. To make the System Partition visible, set this value to Visible. To make the System Partition invisible, set this value to Hidden. See "Using the ServerGuide Setup and Installation CD" on page 21 for additional information about the System Partition. - Core Chipset Control Select this choice to modify settings that control features of the core chip set on the system board. To maintain optimum system operation in the event of a memory failure, you can enable the Hot Spare Memory feature on the Core Chipset Control menu. This feature removes the failed memory from the system configuration and activates a Hot Spare Memory pair or quad of DIMMs to replace the failed memory pair or quad of DIMMs. Before you can enable the Hot Spare Memory feature, you must also install at least one additional memory pair or quad of DIMMs and adhere to special requirements as described in "Installing memory modules" on page 82. You can also enable the Memory Remapping feature on the Core Chipset Control menu. To enable the Hot Spare Memory and Memory Remapping features, change the values from No to Yes. - CPU Options Select this choice to enable or disable the microprocessor cache. In addition, you can set the microprocessor cache mode to write-back (WB) or write-through (WT). Selecting write-back mode will provide better system performance. - PCI Bus Control 14 xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide

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The server uses a startup sequence to determine the device from which the
operating system is loaded. For example, you can define a startup sequence that
checks for a startable diskette in the diskette drive, then checks the hard disk
drive in bay 1, and then checks a network adapter.
You can set the
Planar Ethernet PXE/DHCP
menu choice to enable or disable
the Preboot eXecution Environment (PXE) option for the integrated Gigabit
Ethernet controller. The default setting for this menu item is
Planar Ethernet
,
which enables the PXE option. To disable this option, select
Disabled
.
If the
Boot Fail Count
choice is enabled, you can restore the BIOS system
defaults after three consecutive boot failures. If this choice is disabled, the BIOS
system defaults can be loaded only from the Configuration/Setup Utility main
menu.
You can enable a virus-detection test that checks for changes in the master boot
record at startup.
v
Advanced Setup
Select this choice to change values for advanced hardware features, such as
cache control, PCI configuration, Hot Spare Memory, and Hyper-Threading
technology. This choice appears only on the full Configuration/Setup Utility main
menu.
A warning message appears above the choices on this menu to alert you that the
system might malfunction if these options are configured incorrectly. Follow the
instructions on the screen carefully.
–
System Partition Visibility
Select this choice to indicate whether the System Partition is visible. To make
the System Partition visible, set this value to
Visible
. To make the System
Partition invisible, set this value to
Hidden
. See “Using the ServerGuide Setup
and Installation CD” on page 21 for additional information about the System
Partition.
–
Core Chipset Control
Select this choice to modify settings that control features of the core chip set
on the system board.
To maintain optimum system operation in the event of a memory failure, you
can enable the Hot Spare Memory feature on the
Core Chipset Control
menu. This feature removes the failed memory from the system configuration
and activates a Hot Spare Memory pair or quad of DIMMs to replace the
failed memory pair or quad of DIMMs. Before you can enable the Hot Spare
Memory feature, you must also install at least one additional memory pair or
quad of DIMMs and adhere to special requirements as described in “Installing
memory modules” on page 82. You can also enable the Memory Remapping
feature on the
Core Chipset Control
menu. To enable the Hot Spare Memory
and Memory Remapping features, change the values from
No
to
Yes
.
–
CPU Options
Select this choice to enable or disable the microprocessor cache. In addition,
you can set the microprocessor cache mode to write-back (WB) or
write-through (WT). Selecting write-back mode will provide better system
performance.
–
PCI Bus Control
14
xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide