Description of problem:
IOException: Partition(s) 6 on /dev/mapper/360a9800042566643352b476d67496d44 have been written

Version-Release number of selected component (if applicable):
anaconda 21.48.22.134-1

How reproducible:
always

Steps to Reproduce:
1. Install RHEL-7.5-20180308.1 Server x86_64 on server with SAN disks
   Or you can clone this beaker job to reproduce the bug https://beaker.engineering.redhat.com/recipes/4914636#task69122614
2.
3.

Actual results:
****************snip*********************
Setting up the installation environment    
  
An unknown error has occured, look at the /tmp/anaconda-tb* file(s) for more details 
          
=============================================================================== 
An unknown error has occurred 
      
=============================================================================== 
anaconda 21.48.22.134-1 exception report 
Traceback (most recent call first): 
  File "/usr/lib64/python2.7/site-packages/parted/disk.py", line 213, in commit 
    return self.__disk.commit() 
  File "/usr/lib64/python2.7/site-packages/parted/decorators.py", line 41, in new 
    ret = fn(*args, **kwds) 
  File "/usr/lib/python2.7/site-packages/blivet/formats/disklabel.py", line 290, in commit 
    self.partedDisk.commit() 
  File "/usr/lib/python2.7/site-packages/blivet/devices/partition.py", line 687, in _destroy 
    self.disk.originalFormat.commit() 
  File "/usr/lib/python2.7/site-packages/blivet/devices/storage.py", line 525, in destroy 
    self._destroy() 
  File "/usr/lib/python2.7/site-packages/blivet/deviceaction.py", line 344, in execute 
    self.device.destroy() 
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 373, in processActions 
    action.execute(callbacks) 
  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) 
IOException: Partition(s) 6 on /dev/mapper/360a9800042566643352b476d67496d44 have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use.  As a result, the old partition(s) will remain in use.  You should reboot now before making further changes. 

What do you want to do now? 
1) Report Bug 
2) Debug 
3) Quit 
      
Please make your choice from above:       
****************snip*********************
       

Expected results:
anaconda works 

Additional info: