Support Notes for Red Hat Enterprise Linux AS v.4.5 for HP Integrity Servers

21. Installation to a software RAID 6 volume may result in a kernel panic. If this occurs, try
using a different RAID type such as RAID 5.
22. The cdrecord program may hang when burning a CD-RW disk with unsupported media
using certain models of CD/DVD-ROM Combo and DVD+RW drives shipped in rx1600,
rx1620, rx2600, rx2620, and rx4640 servers.
Use only approved HP CD-RW media to prevent burn hangs. Try different brands of media
if HP media is not available.
23. The ELILO bootloader can pass command-line options to the Linux kernel. The max_addr=
and mem= options limit the amount of memory used by the kernel.
Some versions of the kernel handle these arguments incorrectly, resulting in an MCA that
crashes the system during boot. If the system boots successfully, there is no risk of a crash
due to this problem.
Booting with max_addr= or mem= is sometimes useful for debugging problems, but is not
a tested feature. A similar effect can be achieved by deconfiguring (with the EFI dimmconfig
command) or physically removing DIMMs.
24. System panics may occur on Integrity servers running Linux that have fibre channel (FC)
storage arrays directly connected.
If you plan to connect FC storage to Integrity Servers running Linux, you must connect
through a FC switch. For the BL860c Blade servers, customers must use either the FC switch
module (AE370A/AE371A/AE372A) or an external FC switch.
25. This problem is specific to the LSI1068 SAS I/O controller in the rx2660 and BL860c.
The mpt driver included in RHEL4 does not have the necessary agent components required
by HP System Insight Manager.
To fix this problem, HP has qualified a special version of the mpt driver, which can be
downloaded from the drivers area of www.hp.com .
26. After installing the operating system, if a message similar to the following is displayed, you
will need to take action.
Loading.: Red Hat Enterprise Linux Load of Red Hat Enterprise Linux
failed: Not Found Press any key to continue
To resolve this problem, enter the following commands:
# reconnect -r
# map -r
Then eboot. This can be done by exiting the shell (using the exit command) and reselecting
the EFI boot menu entry.
27. To create a system that can boot either RHEL 4.5 or RHEL 5.0, the RHEL 4.5 system must
be installed and configured before installing the RHEL 5.0 system.
Known Issues 11