I'm having issues currently.
Upgrading a virtual F5 on VMWare currently at 12 HF 2
Uploaded 12.1
Relicensed
Shortly after asking it to install 12.1 to a spare partition TMM core dumped.
Not disk space, nothing obviously wrong.
Log files aren't being much help.
I should stick in a ticket, but this feels like the upgrade process in 12.0 HF 2 is flawed, and of itself should be nothing to do with 12.1 since all its done so far is load the ISO and mount it for installing, and the log messages suggest that maybe the mount is after the crash.