Description of problem:
Install Fedora 21 Alpha TC4 ppc64le on P8 bare metal.

Version-Release number of selected component:
anaconda-21.48.6-1

The following was filed automatically by anaconda:
anaconda 21.48.6-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devicelibs/btrfs.py", line 50, in btrfs
    raise BTRFSError(ret)
  File "/usr/lib/python2.7/site-packages/blivet/devicelibs/btrfs.py", line 118, in delete_subvolume
    return btrfs(args)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 5358, in _destroy
    btrfs.delete_subvolume(mountpoint, self.name)
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 946, in destroy
    self._destroy()
  File "/usr/lib/python2.7/site-packages/blivet/deviceaction.py", line 342, in execute
    self.device.destroy()
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 354, in processActions
    action.execute()
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 354, in doIt
    self.devicetree.processActions()
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 214, in turnOnFilesystems
    storage.doIt()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/install.py", line 178, in doInstall
    turnOnFilesystems(storage, mountOnly=flags.flags.dirInstall)
  File "/usr/lib64/python2.7/threading.py", line 766, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 227, in run
    threading.Thread.run(self, *args, **kwargs)
BTRFSError: 1

Additional info:
addons:         com_redhat_kdump
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   ip=9.3.189.33::9.3.189.1:255.255.255.0:p8euh1:bootdev:none ifname=bootdev:00:90:fa:0d:36:c8 nameserver=9.0.6.11 repo=http://chukar.rch.stglabs.ibm.com/gustavold/f21le/ vnc
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.16.2-301.fc21.ppc64le
product:        Fedora"
release:        Cannot get release name.
type:           anaconda
version:        Fedora

Potential duplicate: bug 1003430