Installation guide

IBM T60 laptops will power off completely when suspended and plugged into a docking station. T o
avoid this, boot the system with the argument acpi_sleep=s3_bios.
The QLogic iSCSI Expansion Card for the IBM Bladecenter provides both ethernet and iSCSI
functions. Some parts on the card are shared by both functions. However, the current qla3xxx and
qla4 xxx drivers support ethernet and iSCSI functions individually. Both drivers do not support the
use of ethernet and iSCSI functions simultaneously.
Because of this limitation, successive resets (via consecutive ifdown/ifup commands) may hang
the device. To avoid this, allow a 10-second interval after an ifup before issuing an ifdown. Also,
allow the same 10-second interval after an ifdown before issuing an ifup. T his interval allows
ample time to stabilize and re-initialize all functions when an ifup is issued.
Laptops equipped with the Cisco Aironet MPI-350 wireless may hang trying to get a DHCP address
during any network-based installation using the wired ethernet port.
To work around this, use local media for your installation. Alternatively, you can disable the wireless
card in the laptop BIOS prior to installation (you can re-enable the wireless card after completing the
installation).
Boot-time logging to /var/log/boot.log is not available in Red Hat Enterprise Linux 5.3.
The system may not successfully reboot into a kexec/kdump kernel if X is running and using a
driver other than vesa. This problem only exists with ATI Rage XL graphics chipsets.
If X is running on a system equipped with ATI Rage XL, ensure that it is using the vesa driver in order
to successfully reboot into a kexec/kdump kernel.
When using Red Hat Enterprise Linux 5.2 on a machine with an nVidia CK804 chipset installed, the
following kernel messages may appear:
kernel: assign_interrupt_mode Found MSI capability
kernel: pcie_portdrv_probe->Dev[005d:10de] has invalid IRQ. Check vendor BIOS
These messages indicate that certain PCI-E ports are not requesting IRQs. They do not, however,
affect the operation of the machine in any way.
Removable storage devices (such as CDs and DVDs) do not automatically mount when you are
logged in as root. As such, you will need to manually mount the device through the graphical file
manager.
Alternatively, you can run the following command to mount a device to /media:
mount /dev/[device name] /m edia
When a LUN is deleted on a configured storage system, the change is not reflected on the host. In
such cases, lvm commands will hang indefinitely when dm -m ultipath is used, as the LUN has
now become stale.
To work around this, delete all device and mpath link entries in /etc/lvm/.cache specific to the
stale LUN.
To find out what these entries are, run the following command:
ls -l /dev/mpath | grep [stale LUN]
For example, if [stale LUN] is 3600d0230003414f30000203a7bc41a00, the following results may
appear:
lrwxrwxrwx 1 root root 7 Aug 2 10:33 /3600d0230003414f30000203a7bc41a00 ->
../dm-4
lrwxrwxrwx 1 root root 7 Aug 2 10:33 /3600d0230003414f30000203a7bc41a00p1 ->
../dm-5
Red Hat Enterprise Linux 5 5.3 Release Notes
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