Boot Disk - Red Hat ENTERPRISE LINUX AS 2.1 Installation Manual

170 Appendix E:Troubleshooting Your Installation of Red Hat Enterprise Linux AS
Check the online errata ( http://www.redhat.com/support/errata) for updated diskette images (if avail-
able) and follow the instructions in Section 1.4.2, Making Installation Diskettes, to make an updated
boot disk for your system.
E.1.3 Is Your System Displaying Signal 11 Errors?
If you receive a fatal signal 11 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 AS 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.
Check to see if you have the latest installation and supplemental boot diskettes 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 see if the problem is either slot or memory related.
For more information concerning signal 11 errors, refer to http://www.bitwizard.nl/sig11/.
E.1.4 Are You Unable to Boot from a Network Boot Disk?
If you are experiencing difficulties in getting the network boot disk you made to boot your system
correctly, you may need an updated boot disk.
Check the online errata for updated diskette images (if available) and follow the instructions provided
to make an updated boot disk for your system.
E.1.5 Are You Unable to Boot With Your RAID Card?
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 will need to repartition your system.
Whether you choose automatic or manual partitioning, you will need to 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 perferred boot loader (GRUB or LILO) outside of the RAID array — not on
the MBR. The boot loader should be installed on the MBR of the same drive as the /boot partition
was created.