I was trying to do a NIM alt_disk_migration on a POWER7 LPAR form AIX 7.1 to 7.2 but the nimadm scripts kept stalling, but without outputting anything interesting, even in debug mode.
In the end I gave up and tried booting the LPAR over the network to do a migration upgrade, but after picking up the kernel from the NIM server, I received this message:
--> ERROR: This system is not supported for use with AIX 7.2. <-- model: IBM,9119-FHB processor: PowerPC,POWER7 (in P6 mode) AIX 7.2 requires the POWER7 (or later) processor. This system is operating in P6 mode.
I had to power the LPAR down, go in to the saved profile and change the compatibility mode back to default:
There you go, migration upgrade running…