I suggest you do an "alt-disk-install" - which would be a fresh install of the new version of the OS - or an "alt-disk-migration", which means:
- breaking the mirror of a mirrored rootvg
- update the OS on the broken-off mirror
- restart the system (from the newly updated disk)
- resynchronize by remirroring using the disk with the old OS version
alt-disk-installation is quite similar, just instead of an update a fresh install is done.
Fortunately all this is done by the procedure itself, you do not do (manually) any of these steps. I just wrote it so you can picture what goes on during the procedure.
Put the disk back in, establish the mirror again and then start over doing an alt-disk-migration. For a procedure for performing an alternate disk migration
read the IBM infocenter page.
I hope this helps.
bakunin