Comment 39 for bug 1828617

Do you have access to the /var/log/ceph/ceph-volume-systemd.log after the latest reboot? That should give us some details such as:

"[2019-05-31 20:43:44,334][systemd][WARNING] failed to find db volume, retries left: 17"

or similar for wal volume.

If you see that the retries have been exceeded in your case you can tune them (the new loops are using the same env vars):

http://docs.ceph.com/docs/mimic/ceph-volume/systemd/#failure-and-retries

As for the pvscan issue, I'm not sure if that is a ceph issue (?).