RHEL7 installation failed on a server with BIOS/UEFI-assisted software RAID provided by LSI

Issue

• RHEL7 installation failed with the following python traceback.

Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devices/partition.py", line 373, in preCommitFixup
    _partition = _disklabel.partedDisk.getPartitionBySector(_sector)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 291, in _preProcessActions
    device.preCommitFixup()
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 367, in processActions
    self._preProcessActions()
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 380, in doIt
    self.devicetree.processActions(callbacks)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 230, in turnOnFilesystems
    storage.doIt(callbacks)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/install.py", line 206, in doInstall
    turnOnFilesystems(storage, mountOnly=flags.flags.dirInstall, callbacks=callbacks_reg)
  File "/usr/lib64/python2.7/threading.py", line 765, 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)
AttributeError: 'DeviceFormat' object has no attribute 'partedDisk'


_disklabel: existing None
self: existing 222.58 GiB partition ddf1_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx (212) with existing lvmpv

• BIOS/UEFI-assisted software RAID provided by LSI is available on the server, and configured a mirroring device on that.