Re: trying to mount the dvd during post install.

["Jeremy Lyon" <jerlyon gmail com>]

that there is no better %post debug and devel environment than to simply
open a shell and see what is going on.  (In fact, I would very much like
to see this capability built into kickstart as a simple option: specify a
DEBUG parameter, and, on error, a shell prompt is provided.) 

There is no need for a DEBUG parameter.  You can get to a shell for debugging by..

1. not putting reboot in your ks.cfg
2. Crtl-Alt-F2

#2 will get you into a shell prompt that will allow you to do your debugging.  If you are running your %post in a chroot fashion (default), the you will want to run chroot /mnt/sysimage and then do your debugging. 

-Jeremy, RHCE