Users Guide

Workaround To avoid this issue, complete the following steps during the operating system installation:

1. Insert the operating system media and proceed through the installation screens to the

drive selection screen.

2. Select Review and Modify Partition Layout.

3. Click Next.

4. Proceed through the installation screens to the GRUB location screen and select

Configure Advanced Bootloader Options.

5. Click Next.

6. Select Change Driver Order.

7. In the Disk Order window, change the disk order.

8. Click OK and continue with the operating system installation.

Cause This issue occurs when the hard drives are configured with more than one redundant array of

independent disks (RAIDs), or when one RAID volume along with one or two individual disks

are connected to the controller.

In this scenario, the Red Hat Enterprise Linux 5 installer installs the GRUB to the incorrect hard

drive.

Issues Fixed In Red Hat Enterprise Linux 5 Update 4

This section contains information about issues, resolutions, and their workarounds when using Red Hat Enterprise Linux

5 Update 4 on your Dell system.

Power Capping Not Functional With Red Hat Enterprise Linux 5

Description In Red Hat Enterprise Linux 5, the integrated Dell Remote Access Controller (iDRAC) may not be

able to limit the maximum power that the system uses by restricting the maximum frequency at

which the CPUs can operate.

Workaround The issue is fixed in Red Hat Enterprise Linux 5 Update 4 Erratum (RHSA-2009-1670).

Cause This issue occurs because of an issue in the cpufreq drivers in Red Hat Enterprise Linux 5.

Kernel Panic With Channel Bonding And IPv6

Description A system configured for bonding with IPv6 addresses can result in a deadlock and kernel

panic. This is further triggered by an incorrect switch configuration that is not suitable for

bonding. The panic is triggered when switches get confused with duplicate IPv6 addresses in

the subnet.

Workaround

1. Group the bonded interfaces to the same channel group of the switch.

2. Disable IPv6 autoconf by running the following commands:

# echo 0 > /proc/sys/net/ipv6/conf/all/accept_ra

# echo 0 > /proc/sys/net/ipv6/conf/all/autoconf