I have just attempted to upgrade my work machine from RH6.0
to RH6.1. The install program crashes at the point where it
is trying to find the existing installation. It fails when
trying to check out partition /dev/sda6 which is an NTFS
partition. The root partition is actually on /dev/sda1.

I was not able to work around this bug by using expert mode
either, as the search for existing installations is still
done automatically.

The error message is:

  Error mounting ext2 filesystem on
  sda6: Invalid argument

The traceback is:

  File "/usr/bin/anaconda.real", line 225, in ?
    intf.run ( todo, test = test)
  File "/tmp/lib/python1.5/site-packages/text.py", line
1000, in run
    rc = apply (step[1](), step[2])
  File "/tmp/lib/python1.5/site-packages/text.py", line
222, in __call__
    parts = todo.upgradeFindRoot()
  File "/tmp/lib/python1.5/site-packages/todo.py", line
1130, in upgradeFindRoot
    isys.umount('/mnt/sysimage')
  File "/tmp/lib/python1.5/site-packages/isys.py", line 8,
in umount
    return _isys.umount(what)
  SystemError: (22, 'Invalid argument')