If you have performed an installation and cannot boot your system
properly, you may need to reinstall and create your partitions
differently.
Some BIOSes do not support booting from RAID cards. At the end of an
installation, a text-based screen showing the boot loader prompt (for
example, GRUB:) and a flashing cursor may be all that
appears. If this is the case, you must repartition your
system.
Whether you choose automatic or manual partitioning, you must
install your /boot partition outside of the RAID
array, such as on a separate hard drive. An internal hard drive is
necessary to use for partition creation with problematic RAID
cards.
You must also install your preferred boot loader (GRUB or LILO) on the
MBR of a drive that is outside of the RAID array. This should be the
same drive that hosts the /boot/ partition.
Once these changes have been made, you should be able to finish your
installation and boot the system properly.
A signal 11 error, commonly know as a segmentation
fault, means that the program accessed a memory location that
was not assigned.
If you receive a fatal signal 11 error during your installation, it is
probably due to a hardware error in memory on your system's bus. A
hardware error in memory can be caused by problems in executables or with
the system's hardware. Like other operating systems, Red Hat Enterprise Linux places its own
demands on your system's hardware. Some of this hardware may not be able
to meet those demands, even if they work properly under another
OS.
Ensure that you have the latest installation updates and images from
Red Hat. Review the online errata to see if newer versions are available. If
the latest images still fail, it may be due to a problem with your
hardware. Commonly, these errors are in your memory
or CPU-cache. A possible solution for this error is turning off the
CPU-cache in the
BIOS. You could also
try to swap your memory around in the motherboard slots to check if the
problem is either slot or memory related.
You can also try running the installation with
only 256 MB
of memory. This can be done by booting
the installation program with the mem=256M boot
option. To try this option, at the installation boot prompt, type:
where xxx should be replaced with the
amount of memory in megabytes.
This command allows you to override the amount of memory the kernel
detects for the machine. This may be needed for some older systems where
only 16MB is detected by the installation program (but more RAM is present
in the system), and for some new machines where the video card shares the
video memory with the main memory.
Another option is to perform a media check on
your installation CD-ROMs. The Red Hat Enterprise Linux installation program has the ability
to test the integrity of the installation media. It works with the CD, DVD,
hard drive ISO, and NFS ISO installation methods. Red Hat recommends that you
test all installation media before starting the installation process, and
before reporting any installation-related bugs (many of the bugs reported
are actually due to improperly-burned CDs). To use this test, type the
following command at the boot: prompt (prepend
with elilo for Itanium systems):
For more information concerning signal 11 errors, refer to:
