When using the "partition" command with the "--onpart" option, I get an "AttributeError: mounts" in function "addMount" in file "todo.py". This seems to be due to the fact that the todo object lacks a mounts attribute. By the way, the code at this point looks suspiciously like the "XXX code from sparc merge" in fstab.py.
Passing to QA to reproduce.
could you attach a copy of the kickstart file you were using ...? this may help us reproduce your problem ... additionally, you filed the bug against Red Hat Linux 6.2. Red Hat Linux 7 has improved the --onpart option (we've fixed known bugs similar to yours), and may fix your problem ...
Closing due to inactivity.