From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)

Description of problem:
Installation fails at line 520. Choice is to start over or debug.  Happens 
after all rpms have been installed.  

How reproducible:
Always

Steps to Reproduce:
1.boot to boot.img floppy
2. select workstation build
3. enter defaults for all
4. after all packages installed
5. system error 
6. save error to disk.
	

Additional info:

Traceback (innermost last):
  File "/usr/bin/anaconda", line 520, in ?
    intf.run(todo, test = test)
  File "/var/tmp/anaconda-7.1//usr/lib/anaconda/text.py", line 1126, in run
    rc = apply (step[1](), args)
  File "/var/tmp/anaconda-7.1//usr/lib/anaconda/text.py", line 551, in 
__call__
    if todo.doInstall ():
  File "/var/tmp/anaconda-7.1//usr/lib/anaconda/todo.py", line 1852, in 
doInstall
    (p, self.intf.messageWindow, pkgTimer))
  File "/var/tmp/anaconda-7.1//usr/lib/anaconda/todo.py", line 1564, in 
instCallback
    fn = self.method.getFilename(h, pkgTimer)
  File "/var/tmp/anaconda-7.1//usr/lib/anaconda/image.py", line 87, in 
getFilename
    isys.umount("/mnt/source")
  
File "/mnt/redhat/test/qa0408.4/i386/RedHat/instimage/usr/lib/anaconda/isys
.py", line 140, in umount
    rc = _isys.umount(what)
SystemError: (16, 'Device or resource busy')

Local variables in innermost frame:
what: /mnt/source
removeDir: 1

ToDo object:
(itodo
ToDo
p1
(dp2
S'resState'
p3
S''
sS'progressWindow'
p4
(itext
ProgressWindow
(dp5
S'scale'
p6
NsS'screen'
p7
(isnack
SnackScreen
p8
(dp9
S'height'
p10
I25
sS'width'
p11
I80
sS'helpCb'
p12

<failed>