Description of problem:
erase drive
add it to raid as RAID READY
create partitions (home and root in extended partition type)
boot into live cd
choose installl
fail

Version-Release number of selected component:
anaconda-core-21.48.14-1.fc21.x86_64

The following was filed automatically by anaconda:
anaconda 21.48.14-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 944, in addUdevPartitionDevice
    raise DeviceTreeError("failed to scan disk %s" % disk.name)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 771, in addUdevDMDevice
    return self.addUdevPartitionDevice(info, disk=disk)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1183, in addUdevDevice
    device = self.addUdevDMDevice(info)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2170, in _populate
    self.addUdevDevice(dev)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2105, in populate
    self._populate()
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 480, in reset
    self.devicetree.populate(cleanupOnly=cleanupOnly)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 183, in storageInitialize
    storage.reset()
  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)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 112, in wait
    self.raise_if_error(name)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/timezone.py", line 75, in time_initialize
    threadMgr.wait(THREAD_STORAGE)
  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)
DeviceTreeError: failed to scan disk pdc_ibghhjfee

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-base
cmdline_file:   BOOT_IMAGE=vmlinuz0 initrd=initrd0.img root=live:CDLABEL=Fedora-Live-Workstation-x86_64-2 rootfstype=auto ro rd.live.image quiet  rhgb rd.luks=0 rd.md=0 rd.dm=0 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.17.2-300.fc21.x86_64
other involved packages: python-blivet-0.61.9-1.fc21.noarch, python-libs-2.7.8-7.fc21.x86_64
product:        Fedora"
release:        Fedora release 21 (Twenty One)
type:           anaconda
version:        Fedora