Error:
boot: Linux
Please wait, loading kernel...
/ht@0,f2000000/pci@5/k2-sata-root@c/k2-sata@0/disk@0:0,/boot/vmlinux: Unknown or corrupt filesystem

yaboot.conf:

boot=/dev/sda2
partition=0
root=/dev/sda3
timeout=50
install=/usr/lib/yaboot/yaboot
magicboot=/usr/lib/yaboot/ofboot
enablecdboot

image=/boot/vmlinux
	label=Linux
	read-only
	initrd=/boot/initrd.img
	append="video=ofonly"

image=/boot/vmlinux.old
	label=old
	read-only
	initrd=/boot/initrd.img.old
	append="video=ofonly"