Installation guide

Chapter 21. Troubleshooting
Installation on an IBM System z
System
This appendix discusses some common installation problems and their solutions.
1. You are Unable to Boot Red Hat Enter-
prise Linux
1.1. Is Your System Displaying Signal 11 Errors?
A signal 11 error, commonly know as a segmentation fault, means that the program accessed a
memory location that was not assigned to it. A signal 11 error may be due to a bug in one of the
software programs that is installed, or faulty hardware.
Ensure that you have the latest installation updates and images from Red Hat. Review the on-
line errata to see if newer versions are available.
2. Trouble During the Installation
2.1. No devices found to install Red Hat Enterprise Linux Error Message
If you receive an error message stating No devices found to install Red Hat Enterprise
Linux, then there may be an issue with your DASD devices. If you encounter this error, add the
DASD=<disks> parameter to your parm file (where disks is the DASD range reserved for installa-
tion) and start the install again.
Additionally, make sure you format the DASDs using the dasdfmt command within a Linux root
shell, instead of formatting the DASDs using CMS.
2.2. Trouble with Partition Tables
If you receive an error after the Disk Partitioning Setup (Section 11, “Disk Partitioning Setup”)
phase of the installation saying something similar to
The partition table on device hda was unreadable. To create new partitions it must be ini-
tialized, causing the loss of ALL DATA on this drive.
you may not have a partition table on that drive or the partition table on the drive may not be re-
cognizable by the partitioning software used in the installation program.
No matter what type of installation you are performing, backups of the existing data on your sys-
tems should always be made.
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