Hi, I am creating a new ceph cluster using REEF. This is my host_specs file [root@controllera config]# cat hosts-specs2.yml service_type: host hostname: computehci01 addr: 20.1.0.2 location: chassis: chassis1 --- service_type: host hostname: computehci02 addr: 20.1.0.3 location: chassis: chassis1 --- service_type: host hostname: computehci03 addr: 20.1.0.4 location: chassis: chassis1 --- service_type: host hostname: computehci04 addr: 20.1.0.5 location: chassis: chassis2 --- service_type: host hostname: computehci05 addr: 20.1.0.6 location: chassis: chassis2 --- service_type: host hostname: computehci06 addr: 20.1.0.7 location: chassis: chassis2 --- service_type: host hostname: computehci07 addr: 20.1.0.8 location: chassis: chassis3 --- service_type: host hostname: computehci08 addr: 20.1.0.9 location: chassis: chassis3 --- service_type: host hostname: computehci09 addr: 20.1.0.10 location: chassis: chassis3 --- service_type: host hostname: computehci10 addr: 20.1.0.11 location: chassis: chassis3 --- service_type: host hostname: computehci11 addr: 20.1.0.12 location: chassis: chassis4 --- service_type: host hostname: computehci12 addr: 20.1.0.13 location: chassis: chassis4 --- service_type: host hostname: computehci13 addr: 20.1.0.14 location: chassis: chassis4 --- service_type: host hostname: computehci14 addr: 20.1.0.15 location: chassis: chassis4 --- service_type: host hostname: computehci15 addr: 20.1.0.16 location: chassis: chassis5 --- service_type: host hostname: computehci16 addr: 20.1.0.17 location: chassis: chassis5 --- service_type: host hostname: computehci17 addr: 20.1.0.18 location: chassis: chassis5 --- service_type: host hostname: computehci18 addr: 20.1.0.19 location: chassis: chassis5 --- service_type: host hostname: computehci19 addr: 20.1.0.20 location: chassis: chassis6 --- service_type: host hostname: computehci20 addr: 20.1.0.21 location: chassis: chassis6 --- service_type: host hostname: computehci21 addr: 20.1.0.22 location: chassis: chassis6 --- service_type: host hostname: computehci22 addr: 20.1.0.24 location: chassis: chassis7 --- service_type: host hostname: computehci23 addr: 20.1.0.25 location: chassis: chassis7 --- service_type: host hostname: computehci24 addr: 20.1.0.26 location: chassis: chassis7 --- service_type: host hostname: computehci25 addr: 20.1.0.28 location: chassis: chassis8 --- service_type: host hostname: computehci26 addr: 20.1.0.29 location: chassis: chassis8 --- service_type: host hostname: computehci27 addr: 20.1.0.30 location: chassis: chassis8 --- service_type: host hostname: controllera addr: 20.1.0.23 --- service_type: host hostname: controllerb addr: 20.1.0.27 --- service_type: host hostname: controllerc addr: 20.1.0.31 --- service_type: mon placement: hosts: - controllera - controllerb - controllerc --- service_type: mgr placement: hosts: - controllera - controllerb - controllerc --- service_type: osd service_id: default_drive_group placement: hosts: - computehci01 - computehci02 - computehci03 - computehci04 - computehci05 - computehci06 - computehci07 - computehci08 - computehci09 - computehci10 - computehci11 - computehci12 - computehci13 - computehci14 - computehci15 - computehci16 - computehci17 - computehci18 - computehci19 - computehci20 - computehci21 - computehci22 - computehci23 - computehci24 - computehci25 - computehci26 - computehci27 spec: data_devices: rotational: 0 All osds were added but, pg still unknown state I've created a pool, but it didn't change anything. [root@controllerb ~]# ceph -s cluster: id: be250ade-e1f2-11ee-a6ff-3cecef2872f0 health: HEALTH_WARN Reduced data availability: 1 pg inactive services: mon: 3 daemons, quorum controllera,controllerc,controllerb (age 3h) mgr: controllerc.jevbkl(active, since 21s), standbys: controllera.zwlolp, controllerb.vqkdga osd: 108 osds: 108 up (since 2m), 108 in (since 24m) data: pools: 2 pools, 33 pgs objects: 0 objects, 0 B usage: 5.1 GiB used, 330 TiB / 330 TiB avail * pgs: 100.000% pgs unknown 33 unknown* Did I miss something? Regards.