Description of problem:
Installation of RHEL-8.1 on IBM Power S822L - [8247-22L] host that has the following two disks fails with 'inconsistent logical block sizes (4096 and 512).
Disks  Model	Size	                    Logical sector  Physical sector
IPR-0  5DBA7D00	283.79 GB / 264.30 GiB	    4096 bytes	    4096 bytes
IPR-0  5DBA7D00	1135.18 GB / 1057.22 GiB    512 bytes	    4096 bytes


Version-Release number of selected component (if applicable):
RHEL-8.1

How reproducible:
Always

Steps to Reproduce:
1. Install RHEL-8.1 on above described hosts (rdma-dev-18)
2.
3.

Actual results:
Installation fails when it tries to create logical volumes with 
    item.start()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/installation_tasks.py", line 304, in start
    item.start()
  File "/usr/lib64/python3.6/site-packages/pyanaconda/installation.py", line 388, in doInstall
    installation_queue.start()
  File "/usr/lib64/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/threading.py", line 286, in run
    threading.Thread.run(self)
gi.overrides.BlockDev.LVMError: Process reported exit code 5:   Devices have inconsistent logical block sizes (4096 and 512).

In log, I see:
in wrappedsr/lib64/python3.6/site-packages/gi/overrides/BlockDev.py", line 967,  

    ret = orig_obj(*args, **kwargs)

in lvm_vgcreateb64/python3.6/site-packages/gi/overrides/BlockDev.py", line 496,  
    return _lvm_vgcreate(name, pv_list, pe_size, extra)

s have inconsistent logical block sizes (4096 and 512).ted exit code 5:   Devicee (0)


During handling of the above exception, another exception occurred:

Expected results:
To install successfully

Additional info:
ignoredisk=--only-use=sda in kickstart installs using /dev/sda. And RHEL-8.0 installs without successfully.