44.6.3. 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.confas 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/ [linux] image=/boot/vmlinuz-2.6.9-5.EL ramdisk=/boot/initrd-2.6.9-5.EL.img parameters="root=LABEL=/" [old] image=/boot/vmlinuz-2.6.9-1.906_EL ramdisk=/boot/initrd-2.6.9-1.906_EL.img parameters="root=LABEL=/"
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
defaultvariable 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/ziplas 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.