Bug 1216208

Description of problem:
I run fedora 22 beta installer after erasing SSD using secure erase as documented in https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase

Version-Release number of selected component:
anaconda-core-22.20.9-1.fc22.x86_64

The following was filed automatically by anaconda:
anaconda 22.20.9-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 951, in addUdevPartitionDevice
    raise UnusableConfigurationError(msg)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1225, in addUdevDevice
    device = self.addUdevPartitionDevice(info)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2194, in _populate
    self.addUdevDevice(dev)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2128, in populate
    self._populate()
  File "/usr/lib/python2.7/site-packages/blivet/blivet.py", line 277, in reset
    self.devicetree.populate(cleanupOnly=cleanupOnly)
  File "/usr/lib/python2.7/site-packages/blivet/osinstall.py", line 1117, 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 244, in run
    threading.Thread.run(self, *args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 115, in wait
    self.raise_if_error(name)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/__init__.py", line 1210, in _runThread
    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 244, in run
    threading.Thread.run(self, *args, **kwargs)
UnusableConfigurationError: failed to scan disk sda

Additional info:
cmdline:        /usr/bin/python2  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-base
cmdline_file:   BOOT_IMAGE=vmlinuz0 initrd=initrd0.img root=live:UUID=1678-1B55 rootfstype=vfat ro rd.live.image quiet  rhgb rd.luks=0 rd.md=0 rd.dm=0 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         4.0.0-0.rc5.git4.1.fc22.x86_64
other involved packages: python-blivet-1.0.7-1.fc22.noarch, python-libs-2.7.9-5.fc22.x86_64
product:        Fedora
release:        Fedora release 22 (Twenty Two)
type:           anaconda
version:        22