Dell PowerEdge R905 Technical Information download pdf (Page 9)

Information Update 7

RHEL Operating System Updates

RHEL Version 4.5 (x86_64) - Support Restrictions for AMD Opteron

Quad-Core Processors (Family 10h)

Red Hat

Enterprise Linux

(RHEL) version 4.5 (x86_64) does not support

AMD Opteron quad-core processors Family 10h. For more information,

see http://kbase.redhat.com/faq/FAQ_85_11697.

To avoid potential machine check errors, use RHEL version 5, RHEL version

4.6, or RHEL version 4.5 errata kernel-2.6.9-55-0.12.

RHEL Versions 4 and 5 (x86_64) - System Hangs While Booting

A bug in the APIC initialization code in RHEL version 4 and version 5

(x86_64) could cause your system to hang while booting. If the NMI

watchdog is enabled, the kernel can wait too long for the HPET, resulting

in a system hang. Otherwise, very long boot-up delays can occur.

As a workaround, pass the parameter nohpet to the kernel command line

at system boot, or enter the System Setup program and disable the

High Precision Event Timer (HPET) option on the Integrated Devices screen.

A fix for this issue will be included in RHEL version 5.2.

SLES9 SP4 Boot Issues With AMD Opteron

Quad-Core Processors (Family 10h)

Novell SLES9 SP4 may fail to load on systems configured with quad-core

processors and more than 4-GB of RAM memory. A future maintenance

update from Novell will correct this issue. Currently, you can bypass the issue

by using one of the following methods:

• In the System Setup program, enable the

Node Interleaving

option

on the

Memory Information

screen.

• In the operating system boot parameter file, set the memory parameter

to a value less than 4-GB (for example, 3900m).

See the operating system documentation if you need more information.

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Dell PowerEdge R905 Technical Information Page 9