Description of problem:
package libblockdev-nvdimm is missing in RHVH 4.4 which is causing disk sync failure.
[root@tendrl25 ~]# rpm -qa | grep "blivet"
python3-blivet-3.1.0-19.el8.noarch
blivet-data-3.1.0-19.el8.noarch

[root@tendrl25 ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux release 8.2


Full log:

[root@tendrl25 ~]# /usr/bin/python3
Python 3.6.8 (default, Dec  5 2019, 15:45:45)
[GCC 8.3.1 20191121 (Red Hat 8.3.1-5)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import blivet
 
** (process:857218): WARNING **: 16:35:31.051: failed to load module lvm: libbd_lvm.so.2: cannot open shared object file: No such file or directory
 
** (process:857218): WARNING **: 16:35:31.059: failed to load module mpath: libbd_mpath.so.2: cannot open shared object file: No such file or directory
 
** (process:857218): WARNING **: 16:35:31.059: failed to load module dm: libbd_dm.so.2: cannot open shared object file: No such file or directory
 
** (process:857218): WARNING **: 16:35:31.060: failed to load module nvdimm: libbd_nvdimm.so.2: cannot open shared object file: No such file or directory
>>> blivetEnv = blivet.Blivet()
>>> blivetEnv.reset()
 
** (process:857218): CRITICAL **: 16:35:49.913: The function 'bd_nvdimm_namespace_get_devname' called, but not implemented!
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/blivet.py", line 161, in reset
    self.devicetree.populate(cleanup_only=cleanup_only)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 413, in populate
    self._populate()
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 461, in _populate
    self.handle_device(dev)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 261, in handle_device
    helper_class = self._get_device_helper(info)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 226, in _get_device_helper
    return get_device_helper(info)
  File "/usr/lib/python3.6/site-packages/blivet/populator/helpers/__init__.py", line 53, in get_device_helper
    return _six.next((h for h in _device_helpers if h.match(data)), None)
  File "/usr/lib/python3.6/site-packages/blivet/populator/helpers/__init__.py", line 53, in <genexpr>
    return _six.next((h for h in _device_helpers if h.match(data)), None)
  File "/usr/lib/python3.6/site-packages/blivet/populator/helpers/disk.py", line 228, in match
    udev.device_is_nvdimm_namespace(data))
  File "/usr/lib/python3.6/site-packages/blivet/udev.py", line 966, in device_is_nvdimm_namespace
    ninfo = blockdev.nvdimm_namespace_get_devname(devname)
GLib.Error: g-bd-init-error-quark: The function 'bd_nvdimm_namespace_get_devname' called, but not implemented! (1)



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