Bug 170090

Description of problem:
I'm installing Fedora Core 4 on an IBM T21, I ran each cd through the test.  
version 3 installed fine for someone else (http://linux.is-a-
geek.net/laptop/t21-fc3.html).  The first time I ran it I got an error just 
after it started to install.  I rebooted and got this far, then rebooted again 
and again got this far.  As soon as I click Next a box comes up 
with "Searching for Fedora Core Installations"..chugs a little then the 
following "Exception Occured" window displays:

File "/user/lib/anaconda/gui.py", line 873, in nextClicked
  self.dispatch.gotoNext()
File "/user/lib/anaconda/dispatch.py", line 174, in gotoNext
  self.moveStep()
File "/user/lib/anaconda/dispatch.py", line 242, in moveStep
  rc=apply(func, self.vindArgs(args))
File "/user/lib/anaconda/upgrade.py", line 49, in findRootParts
  id.rootParts = findExistingRoots(intf, id, chroot)
File "/usr/lib/anaconda/upgrade.py", line 80, in findExistingRoots
  upgradeany = upgradeany)
File "/user/lib/anaconda/partedUtils.py", line 620, in 
findExistingRootPartitions
  for isValidXFS(device):
File "/user/lib/anaconda/fsset.py", line 2425, in inValidXFS
  buf = os.read(fd, 4)
OSError: [Errno 5] Input/output error

If I select the text install I get the below at the same spot:
File "/usr/bin/anaconda", line 1160, in ?
  intf.run(id, dispatch)
File "/usr/lib/anaconda/text.py, line 
496, in run
  dispatch.gotoNext()
File "/user/lib/anaconda/dispatch.py", line 174, in gotoNext
  self.moveStep()
File "/user/lib/anaconda/dispatch.py", line 242, in moveStep
  rc=apply(func, self.vindArgs(args))
File "/user/lib/anaconda/upgrade.py", line 49, in findRootParts
  id.rootParts = findExistingRoots(intf, id, chroot)
File "/usr/lib/anaconda/upgrade.py", line 80, in findExistingRoots
  upgradeany = upgradeany)
File "/user/lib/anaconda/partedUtils.py", line 620, in 
findExistingRootPartitions
  for isValidXFS(device):
File "/usr/lib/anaconda/fsset.py", line
2494, in getFStoTry
  if isValidXFS(device):
File "/usr/lib/anaconda/fsset.py", line
2425, in isValidXFS
  buf = os.read(fd, 4)
OSError: [Errno 5] Input/output error

These cd's are freshly burned so maybe there's something wrong but I highly 
doubt it if the 'test' i ran them through in the beginning came up as "Pass"

Version-Release number of selected component (if applicable):


How reproducible:
every time

Steps to Reproduce:
1.boot from cd #1
2.select only defaults (simply hit next in each screen)
3.error comes up after selecting keyboard-english, right as I hit Next
  
Actual results:
The "Exception Occured" box pops up and I must reboot.  I can go into debut 
mode but am not familiar with the "(Pdb)" command prompt to do anything with 
it..

Expected results:
It should go to the next question/prompt in the installation procedure (not 
surprising..)

Additional info: