I'm trying to add a new storage host into a Ceph cluster (quincy 17.2.6). The machine has boot drives, one free SSD and 10 HDDs. The plan is to have each HDD be an OSD with a DB on a equal size lvm of the SDD. This machine is newer but otherwise similar to other machines already in the cluster that are setup and running the same way. But I've been unable to add OSDs and unable to figure out why, or fix it. I have some experience, but I'm not an expert and could be missing something obvious. If anyone has any suggestions, I would appreciate it. I've tried to add OSDs a couple different ways. Via the dashboard, this has worked fine for previous machines. And it appears to succeed and gives no errors that I can find looking in /var/log/ceph and dashboard logs. The OSDs are never created. In fact, the drives still show up as available in Physical Disks and I can do the same creation procedure repeatedly. I've tried creating it in cephadm shell with the following, which has also worked in the past: ceph orch daemon add osd stor04.fqdn:data_devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf,/dev/sdg,/dev/sdh,/dev/sdi,/dev/sdj,/dev/sdk,db_devices=/dev/sda,osds_per_device=1 The command just hangs. Again I wasn't able to find any obvious errors. Although this one did seem to cause some slow op errors from the monitors that required restarting a monitor. And it could cause errors with the dashboard locking up and having to restart the manager as well. And I've tried setting 'ceph orch apply osd --all-available-devices --unmanaged=false' to let Ceph automatically add the drives. In the past, this would cause Ceph to automatically add the drives as OSDs but without having associated DBs on the SSD. The SSD would just be another OSD. This time it appears to have no affect and similar to the above, I wasn't able to find any obvious error feedback. -Mike