40.6.3. IBM S/390 and IBM System z Systems

40.6.3. IBM S/390 and IBM System z Systems

The IBM S/390 and IBM System z systems use z/IPL as the boot loader, which uses /etc/zipl.conf as the configuration file. Confirm that the file contains a section with the same version as the kernel package just installed:

[defaultboot] default=old target=/boot/ 

Notice that the default is not set to the new kernel. To configure z/IPL to boot the new kernel by default, change the value of the default variable to the name of the section that contains the new kernel. The first line of each section contains the name in brackets.

After modifying the configuration file, run /sbin/zipl as root to enable the changes.

Begin testing the new kernel by rebooting the computer and watching the messages to ensure that the hardware is detected properly.

Note: This documentation is provided {and copyrighted} by Red Hat®, Inc. and is released via the Open Publication License. The copyright holder has added the further requirement that Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. The CentOS project redistributes these original works (in their unmodified form) as a reference for CentOS-5 because CentOS-5 is built from publicly available, open source SRPMS. The documentation is unmodified to be compliant with upstream distribution policy. Neither CentOS-5 nor the CentOS Project are in any way affiliated with or sponsored by Red Hat®, Inc.