I can confirm that the upgrade completed successfully after a couple of further problems.
1. I migrated all the data off one SSA tower and then disconnected it as I thought the upgrade would work if I only had 2 root disks and 48 SSA disks, but no such luck. After booting from the CD, I got...
Yes, I ran lqueryvg -Atp on the two rootvg disks and everything looked OK.
I'm pretty sure the problem is a limit of 64 disks and I've just been unlucky that I have 66.
I'll take your advice and disconnect the SSA disks before trying the upgrade again.
Thanks for your assistance.
I have an IBM 7028-6E4 (P630) running AIX 5.2 ML1 and tried to upgrade it to 5.3 ML3 by booting from the software CD's. It booted OK, but didn't give the option for a Migration upgrade, only a Preservation or a New and Complete Install. I got the same result with rootvg mirrored and also...
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