Issue

• Installation of Red Hat Enterprise Linux 7.2 fails with an error below. The installation is with LVM on md raid devices as per configured in kickstart.

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An unknown error has occurred
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anaconda 21.48.22.56-1 exception report
Traceback (most recent call first): 
  File "/usr/lib/python2.7/site-packages/blivet/devicelibs/lvm.py", line 538, in lvactivate
    raise LVMError("lvactivate failed for %s: %s" % (lv_name, msg))
  File "/usr/lib/python2.7/site-packages/blivet/devices/lvm.py", line 690, in _setup
    lvm.lvactivate(self.vg.name, self._name)
  File "/usr/lib/python2.7/site-packages/blivet/devices/storage.py", line 413, in setup
    self._setup(orig=orig)
  File "/usr/lib/python2.7/site-packages/blivet/deviceaction.py", line 650, in execute
    self.device.setup(orig=True)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 377, in processActions
    action.execute(callbacks)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 374, in doIt
    self.devicetree.processActions(callbacks)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 224, in turnOnFilesystems
    storage.doIt(callbacks)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/install.py", line 186, in doInstall
    turnOnFilesystems(storage, mountOnly=flags.flags.dirInstall, callbacks=callbacks_reg)
  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 227, in run
    threading.Thread.run(self, *args, **kwargs)
LVMError: lvactivate failed for swap: running lvm lvchange -a y --config  devices { preferred_names=["^/dev/mapper/", "^/dev/md/", "^/dev/sd"] }  redhat/swap failed
===============================================================================
An unknown error has occurred
===============================================================================
anaconda 21.48.22.56-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devicelibs/lvm.py", line 243, in pvcreate
    raise LVMError("pvcreate failed for %s: %s" % (device, msg))
  File "/usr/lib/python2.7/site-packages/blivet/formats/lvmpv.py", line 132, in create
    lvm.pvcreate(self.device, data_alignment=self.dataAlignment)
  File "/usr/lib/python2.7/site-packages/blivet/deviceaction.py", line 568, in execute
    options=self.device.formatArgs)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 377, in processActions
    action.execute(callbacks)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 374, in doIt
    self.devicetree.processActions(callbacks)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 224, in turnOnFilesystems
    storage.doIt(callbacks)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/install.py", line 186, in doInstall
    turnOnFilesystems(storage, mountOnly=flags.flags.dirInstall, callbacks=callbacks_reg)
  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 227, in run
    threading.Thread.run(self, *args, **kwargs)
LVMError: pvcreate failed for /dev/md/2: running lvm pvcreate --config  devices { preferred_names=["^/dev/mapper/", "^/dev/md/", "^/dev/sd"] }  /dev/md/2 failed