36.6.5. IBM eServer pSeries Systems

IBM eServer pSeries systems use YABOOT as the boot loader, which uses /etc/aboot.conf as the configuration file. Confirm that the file contains an image section with the same version as the kernel package just installed:
boot=/dev/sda1
init-message=Welcome to Red Hat Enterprise Linux!
Hit <TAB> for boot options
 
partition=2
timeout=30
install=/usr/lib/yaboot/yaboot
delay=10
nonvram

image=/vmlinux--2.6.9-5.EL
        label=old
        read-only
        initrd=/initrd--2.6.9-5.EL.img
        append="root=LABEL=/"
 
image=/vmlinux-2.6.9-5.EL
        label=linux
        read-only
        initrd=/initrd-2.6.9-5.EL.img
        append="root=LABEL=/"
Notice that the default is not set to the new kernel. The kernel in the first image is booted by default. To change the default kernel to boot either move its image stanza so that it is the first one listed or add the directive default and set it to the label of the image stanza that contains the new kernel.
Begin testing the new kernel by rebooting the computer and watching the messages to ensure that the hardware is detected properly.