Description of problem:

Anaconda crashes with exception when scanning devices (after select keyboard screen).

Traceback (most recent call first):
  File "/usr/lib/anaconda/storage/formats/fs.py", line 517, in mount
    raise FSError("mount failed: %s" % e)
  File "/usr/lib/anaconda/storage/formats/fs.py", line 213, in _getExistingSize
    self.mount(mountpoint=tmppath, options="ro")
  File "/usr/lib/anaconda/storage/formats/fs.py", line 164, in __init__
    self._size = self._getExistingSize()
  File "/usr/lib/anaconda/storage/formats/__init__.py", line 89, in getFormat
    fmt = fmt_class(*args, **kwargs)
  File "/usr/lib/anaconda/storage/devicetree.py", line 1465, in handleUdevDeviceFormat
    device.format = formats.getFormat(*args, **kwargs)
  File "/usr/lib/anaconda/storage/devicetree.py", line 1166, in addUdevDevice
    self.handleUdevDeviceFormat(info, device)
  File "/usr/lib/anaconda/storage/devicetree.py", line 1588, in populate
    self.addUdevDevice(dev)
  File "/usr/lib/anaconda/storage/__init__.py", line 283, in reset
    self.devicetree.populate()
  File "/usr/lib/anaconda/storage/__init__.py", line 72, in storageInitialize
    storage.reset()
  File "/usr/lib/anaconda/dispatch.py", line 205, in moveStep
    rc = stepFunc(self.anaconda)
  File "/usr/lib/anaconda/dispatch.py", line 128, in gotoNext
    self.moveStep()
  File "/usr/lib/anaconda/gui.py", line 1323, in nextClicked
    self.anaconda.dispatch.gotoNext()
FSError: mount failed: (2, None)


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

anaconda-11.5.0.42-1.i586
Fedora 11 snapshot 1

How reproducible:

always, for the moment

Steps to Reproduce:
1. Boot Fedora 11 snapshot 1
2. "Install to hard drive"
3. Select "U.S. english" and click on next... install anyway...
4. Anaconda starts device scan and crashes