Comment 3 for bug 1925347

This fixed the bug for me, thanks! To reproduce/validate I deploy Ceph Pacific on Hirsute s390x machines using this Juju bundle. [0]

If I leave the software source as `distro`, I hit the bug, i.e. ceph-osd fails to start with:
bluestore(/var/lib/ceph/osd/ceph-0/block) _read_bdev_label failed to open /var/lib/ceph/osd/ceph-0/block: (1) Operation not permitted

If I then change the software source to `distro-proposed`, this ends up installing ceph-osd 16.2.1-0ubuntu0.21.04.1 and Ceph works as expected.

[0] https://github.com/openstack-charmers/openstack-bundles/blob/master/development/ceph-base-hirsute-pacific/bundle.yaml