Description of problem:
Attempted to install Fedora using "Install to Hard Drive" option on older system with attached softraided arrays

Version-Release number of selected component:
anaconda-20.25.15-1.fc20.x86_64

The following was filed automatically by anaconda:
anaconda 20.25.15-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devicelibs/mdraid.py", line 266, in name_from_md_node
    for link in os.listdir(md_dir):
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 2297, in resolveDevice
    md_name = devicelibs.mdraid.name_from_md_node(devspec[5:])
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 3129, in parseFSTab
    options=options)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 3052, in findExistingInstallations
    (mounts, swaps) = parseFSTab(devicetree, chroot=ROOT_PATH)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 427, in reset
    self.roots = findExistingInstallations(self.devicetree)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 142, in storageInitialize
    storage.reset()
  File "/usr/lib64/python2.7/threading.py", line 764, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 192, in run
    threading.Thread.run(self, *args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 109, in wait
    self.raise_if_error(name)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/__init__.py", line 889, in payloadInitialize
    threadMgr.wait(THREAD_STORAGE)
  File "/usr/lib64/python2.7/threading.py", line 764, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 192, in run
    threading.Thread.run(self, *args, **kwargs)
OSError: [Errno 2] No such file or directory: '/dev/md'

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda --liveinst --method=livecd:///dev/mapper/live-base
cmdline_file:   initrd=initrd0.img root=live:CDLABEL=Fedora-Live-Xfce-x86_64-20-1 rootfstype=auto ro rd.live.image quiet  rhgb rd.luks=0 rd.md=0 rd.dm=0  BOOT_IMAGE=vmlinuz0 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.11.10-301.fc20.x86_64
other involved packages: python-blivet-0.23.9-1.fc20.noarch, python-libs-2.7.5-9.fc20.x86_64
product:        Fedora
release:        Fedora release 20 (Heisenbug)
type:           anaconda
version:        20