The kbase article at <https://access.redhat.com/knowledge/solutions/66471> confirms "dump" supports ext4. Is it possible to backport the corresponding manual change from upstream (0.4b43)? Thanks.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.