What AIX version are you running? Will it allow you to create a bootlist at all instead of listing one?
bootlist -m normal hdisk0
Have you added, mirrored, unmirrored or otherwise played with the boot device/rootvg lately? Perhaps a NIM activity or a Live Partition Migration activity, added an additional VIO server with disk path connectivity, or swung disk from an LPAR shell on one box to an LPAR shell on another box to migrate?
Maybe you need to run a bosboot -a -d hdisk0 (or whatever disk number you boot from).
Last edited by xj-linux; 09-16-2012 at 08:34 PM.