Hi, When build cluster Octopus 15.2.5 initially, here is the OSD service spec file applied. ``` service_type: osd service_id: osd-spec placement: host_pattern: ceph-osd-[1-3] data_devices: rotational: 1 db_devices: rotational: 0 ``` After applying it, all HDDs were added and DB of each hdd is created on SSD. Here is the export of OSD service spec. ``` # ceph orch ls --service_name osd.osd-spec --export service_type: osd service_id: osd-spec service_name: osd.osd-spec placement: host_pattern: ceph-osd-[1-3] spec: data_devices: rotational: 1 filter_logic: AND objectstore: bluestore ``` Why db_devices doesn't show up there? When I replace a disk recently, when the new disk was installed and zapped, OSD was automatically re-created, but DB was created on HDD, not SSD. I assume this is because of that missing db_devices? I tried to update service spec, the same result, db_devices doesn't show up when export it. Is this some known issue or something I am missing? Thanks! Tony