Hi Community, currently i’m installing an nvme only storage cluster with cephadm from scratch (v.17.2.5). Everything works fine. Each of my nodes (6) has 3 enterprise nvme’s with 7TB capacity. At the beginning I only installed one OSD per nvme, now I want to use four instead of one but I’m struggling with that. Frist of all I set the following option in my cluster: ceph orch apply osd --all-available-devices --unmanaged=true As I understand this option should prevent cephadm to automatically fetch new, available disks and deploying OSD daemons. But that seems not to work. If I delete and purge my OSD and zapping the disk with ceph orch device zap ceph-nvme01 /dev/nvme2n1 –force the disk came available for the cluster and seconds later it deploys the same OSD ID than it has before. I checked that the old OSD was completely removed and the docker container was not started. My next try was to set: ceph orch host label add ceph-nvme01 _no_schedule purge the OSD zapping the disk and following: ceph orch daemon add osd ceph-nvme01:/dev/nvme2n1,osds_per_device=4 removing the _no_schedule flag and again: the old OSD was recreated and not 4. So where is my mistake? Thank you!