Download Red Hat ENTERPRISE 5.3 RELEASE NOTES Installation guide

Red Hat Enterprise Linux 5 5.3 Release Notes
Enterprise Linux 5.2 for the IBM System z does not support the firstboot functionality during initial
program load.
T o properly initialize setup for Red Hat Enterprise Linux 5.2 on the IBM System z, run the following
commands after installation:
/usr/bin/setup — provided by the setuptool package.
/usr/bin/rhn_register — provided by the rhn-setup package.
9.6. ia64 Architecture
Some Itanium systems cannot properly produce console output from the kexec purgatory code.
T his code contains instructions for backing up the first 640k of memory after a crash.
While purgatory console output can be useful in diagnosing problems, it is not needed for kdum p
to properly function. As such, if your Itanium system resets during a kdum p operation, disable
console output in purgatory by adding --noio to the KEXEC_ARGS variable in
/etc/sysconfig/kdum p.
Running perftest will fail if different CPU speeds are detected. As such, you should disable CPU
speed scaling before running perftest.
When the kdum p kernel is booted, the following error will appear in the boot log:
mknod: /tmp/initrd.[numbers]/dev/efirtc: No such file or directory
T his error results from a malformed request to create the efirtc in an incorrect path. However, the
device path in question is also created statically in the initram fs when the kdum p service is
started. As such, the run-time creation of the device node is redundant, harmless, and should not
affect the performance of kdum p.
Some systems may be unable to boot the kdum p kernel properly. In such cases, use the
m achvec=dig kernel parameter.
Recording needs to be manually enabled on Dell M4300 and M6300. T o do this, perform the
following steps:
1. Open alsam ixer.
2. Press T ab to toggle [Capture] in the View field (located at the upper left part of the menu).
3. Press the Space bar.
4. T o verify that recording is enabled, the text above the ADCMux field should display L R
CAPT UR.
On Intel Itanium-based systems running SELinux in enforcing mode, either the
allow_unconfined_execm em _dyntrans or allow_execm em Booleans must be turned on to
allow the IA-32 Execution Layer (the ia32el service) to operate correctly. If the
allow_unconfined_execm em _dyntrans Boolean is off, but the allow_execm em Boolean is
on, which it is by default in Red Hat Enterprise Linux 5, the ia32el service supports 32-bit emulation;
however, if both Booleans are off, emulation fails.
10. Added Packages
cmirror-1.1.36-1.el5
Group: System Environm ent/Base
Summary: cm irror - T he Cluster Mirror Package
Description:
44