Installation guide

Chapter 21. Troubleshooting Installation on an IBM System z
System
This appendix discusses some common installation problems and their solutions.
21.1. You are Unable t o Boot Red Hat Ent erprise Linux
21.1.1. Is Your Syst em 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 online
errata to see if newer versions are available.
21.2. Trouble During t he Inst allat ion
21.2.1. 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 D ASD devices. If you encounter this error, add the
DASD=<disks> parameter to your parm file (where disks is the DASD range reserved for installation)
and start the install again.
Additionally, make sure you format the DASD s using the dasdfmt command within a Linux root
shell, instead of formatting the DASDs using CMS.
21.2.2. T rouble wit h Part it ion T ables
If you receive an error after the Disk Partitioning Setup (Section 17.11, “D isk 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
initialized, 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
recognizable 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 systems
should always be made.
21.2.3. Ot her Part it ioning Problems
If you are using Disk Dru id to create partitions, but cannot move to the next screen, you probably
have not created all the partitions necessary for Disk Dru id 's dependencies to be satisfied.
You must have the following partitions as a bare minimum:
A / (root) partition
⁠Chapt er 2 1 . T roubleshoot ing Inst allat ion on an IBM Syst em z Syst em
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