Hi, I'm trying to update my cluster (19.2.2 -> 19.2.3), mon and mgr upgrade goes well but I had some issue with OSD : Upgrade: unsafe to stop osd(s) at this time (165 PGs are or would become offline) Cluster is in health_ok All pools are replica 3 and pgs active+clean autoscaler is off following the ceph docs Does ceph osd ok-to-stop lead to lost data ? The only rules used in the cluster is replicated_rule : root@ceph-monitor-1:/# ceph osd crush rule dump replicated_rule { "rule_id": 0, "rule_name": "replicated_rule", "type": 1, "steps": [ { "op": "take", "item": -1, "item_name": "inist" }, { "op": "chooseleaf_firstn", "num": 0, "type": "host" }, { "op": "emit" } ] } root@ceph-monitor-1:/# ceph osd tree ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF -1 6.63879 root inist -15 0.90970 host ceph-monitor-1 6 hdd 0.90970 osd.6 up 1.00000 1.00000 -21 5.72910 datacenter bat1 -20 2.72910 room room01 -19 2.72910 row left -18 2.72910 rack 10 -3 0.90970 host ceph-node-1 2 hdd 0.90970 osd.2 up 1.00000 1.00000 -5 0.90970 host ceph-node-2 1 hdd 0.90970 osd.1 up 1.00000 1.00000 -9 0.90970 host ceph-node-3 5 hdd 0.90970 osd.5 up 1.00000 1.00000 -36 3.00000 room room03 -35 3.00000 row left06 -34 3.00000 rack 08 -7 1.00000 host ceph-node-4 0 hdd 1.00000 osd.0 up 1.00000 1.00000 -13 1.00000 host ceph-node-5 3 hdd 1.00000 osd.3 up 1.00000 1.00000 -11 1.00000 host ceph-node-6 4 hdd 1.00000 osd.4 up 1.00000 1.00000 Thanks ! Vivien