Hello, I will try to keep it sad and short :) :( PS sorry if this dublicate I tried post it from web also. Today I upgraded from 16.2.3 to 16.2.4 and added few hosts and osds. After data migration for few hours, 1 SSD failed, then another and another 1 by 1. Now I have cluster in pause and 5 failed SSD's, same host has SSD and HDD, but only SSD's are failing so I think this has to be balancing refiling or something bug and probably not upgrade bug. Cluster has been in pause for 4 hours and no more OSD's are failing. full trace https://pastebin.com/UxbfFYpb Now I m googling and learning but, Is there a way how to easily test lets say 15.2.XX version on osd without losing anything? Any help would be appreciated. Error start like this May 14 16:58:52 dragon-ball-radar systemd[1]: Starting Ceph osd.2 for 4e01640b-951b-4f75-8dca-0bad4faf1b11... May 14 16:58:53 dragon-ball-radar podman[113650]: 2021-05-14 16:58:53.057836433 +0000 UTC m=+0.454352919 container create 3b44520aa651b8196cd0bf0c96daa2bd03845ef5f8cfaf9a689410a1f98d84dd (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2-activate, GIT_BRANCH=HEAD, maintainer=D May 14 16:58:53 dragon-ball-radar systemd[1]: Started libcrun container. May 14 16:58:53 dragon-ball-radar podman[113650]: 2021-05-14 16:58:53.3394116 +0000 UTC m=+0.735928098 container init 3b44520aa651b8196cd0bf0c96daa2bd03845ef5f8cfaf9a689410a1f98d84dd (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2-activate, maintainer=Dimitri Savineau <dsav May 14 16:58:53 dragon-ball-radar podman[113650]: 2021-05-14 16:58:53.446921192 +0000 UTC m=+0.843437626 container start 3b44520aa651b8196cd0bf0c96daa2bd03845ef5f8cfaf9a689410a1f98d84dd (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2-activate, GIT_BRANCH=HEAD, org.label-sch May 14 16:58:53 dragon-ball-radar podman[113650]: 2021-05-14 16:58:53.447050119 +0000 UTC m=+0.843566553 container attach 3b44520aa651b8196cd0bf0c96daa2bd03845ef5f8cfaf9a689410a1f98d84dd (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2-activate, org.label-schema.name=CentOS May 14 16:58:53 dragon-ball-radar bash[113558]: Running command: /usr/bin/chown -R ceph:ceph /var/lib/ceph/osd/ceph-2 May 14 16:58:53 dragon-ball-radar bash[113558]: Running command: /usr/bin/ceph-bluestore-tool --cluster=ceph prime-osd-dir --dev /dev/ceph-45e6ef2e-fbdc-4289-a900-3d1ffc81ee14/osd-block-973cfe73-06c8-4ea0-9aea-1361d063eb25 --path /var/lib/ceph/osd/ceph-2 --no-mon-config May 14 16:58:53 dragon-ball-radar bash[113558]: Running command: /usr/bin/ln -snf /dev/ceph-45e6ef2e-fbdc-4289-a900-3d1ffc81ee14/osd-block-973cfe73-06c8-4ea0-9aea-1361d063eb25 /var/lib/ceph/osd/ceph-2/block May 14 16:58:53 dragon-ball-radar bash[113558]: Running command: /usr/bin/chown -h ceph:ceph /var/lib/ceph/osd/ceph-2/block May 14 16:58:53 dragon-ball-radar bash[113558]: Running command: /usr/bin/chown -R ceph:ceph /dev/dm-1 May 14 16:58:53 dragon-ball-radar bash[113558]: Running command: /usr/bin/chown -R ceph:ceph /var/lib/ceph/osd/ceph-2 May 14 16:58:53 dragon-ball-radar bash[113558]: --> ceph-volume lvm activate successful for osd ID: 2 May 14 16:58:53 dragon-ball-radar podman[113650]: 2021-05-14 16:58:53.8147653 +0000 UTC m=+1.211281741 container died 3b44520aa651b8196cd0bf0c96daa2bd03845ef5f8cfaf9a689410a1f98d84dd (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2-activate) May 14 16:58:55 dragon-ball-radar podman[113650]: 2021-05-14 16:58:55.044964534 +0000 UTC m=+2.441480996 container remove 3b44520aa651b8196cd0bf0c96daa2bd03845ef5f8cfaf9a689410a1f98d84dd (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2-activate, CEPH_POINT_RELEASE=-16.2.4, R May 14 16:58:55 dragon-ball-radar podman[113909]: 2021-05-14 16:58:55.594265612 +0000 UTC m=+0.369978347 container create 31364008fcb8b290643d6e892fba16d19618f5682f590373feabed23061749da (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2, RELEASE=HEAD, org.label-schema.build-d May 14 16:58:55 dragon-ball-radar podman[113909]: 2021-05-14 16:58:55.864589286 +0000 UTC m=+0.640302021 container init 31364008fcb8b290643d6e892fba16d19618f5682f590373feabed23061749da (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2, org.label-schema.schema-version=1.0, GIT May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.896+0000 7fcf16aa2080 0 set uid:gid to 167:167 (ceph:ceph) May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.896+0000 7fcf16aa2080 0 ceph version 16.2.4 (3cbe25cde3cfa028984618ad32de9edc4c1eaed0) pacific (stable), process ceph-osd, pid 2 May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.896+0000 7fcf16aa2080 0 pidfile_write: ignore empty --pid-file May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.896+0000 7fcf16aa2080 1 bdev(0x564ad3a8c800 /var/lib/ceph/osd/ceph-2/block) open path /var/lib/ceph/osd/ceph-2/block May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.900+0000 7fcf16aa2080 1 bdev(0x564ad3a8c800 /var/lib/ceph/osd/ceph-2/block) open size 500103643136 (0x7470800000, 466 GiB) block_size 4096 (4 KiB) non-rotational discard supported May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.900+0000 7fcf16aa2080 1 bluestore(/var/lib/ceph/osd/ceph-2) _set_cache_sizes cache_size 3221225472 meta 0.45 kv 0.45 data 0.06 May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.900+0000 7fcf16aa2080 1 bdev(0x564ad3a8cc00 /var/lib/ceph/osd/ceph-2/block) open path /var/lib/ceph/osd/ceph-2/block May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.900+0000 7fcf16aa2080 1 bdev(0x564ad3a8cc00 /var/lib/ceph/osd/ceph-2/block) open size 500103643136 (0x7470800000, 466 GiB) block_size 4096 (4 KiB) non-rotational discard supported May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.900+0000 7fcf16aa2080 1 bluefs add_block_device bdev 1 path /var/lib/ceph/osd/ceph-2/block size 466 GiB May 14 16:58:55 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:55.900+0000 7fcf16aa2080 1 bdev(0x564ad3a8cc00 /var/lib/ceph/osd/ceph-2/block) close May 14 16:58:55 dragon-ball-radar podman[113909]: 2021-05-14 16:58:55.972267166 +0000 UTC m=+0.747979911 container start 31364008fcb8b290643d6e892fba16d19618f5682f590373feabed23061749da (image=docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949, name=ceph-4e01640b-951b-4f75-8dca-0bad4faf1b11-osd.2, ceph=True, GIT_REPO=https://github.com/ May 14 16:58:55 dragon-ball-radar bash[113558]: 31364008fcb8b290643d6e892fba16d19618f5682f590373feabed23061749da May 14 16:58:55 dragon-ball-radar systemd[1]: Started Ceph osd.2 for 4e01640b-951b-4f75-8dca-0bad4faf1b11. May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.184+0000 7fcf16aa2080 1 bdev(0x564ad3a8c800 /var/lib/ceph/osd/ceph-2/block) close May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.444+0000 7fcf16aa2080 1 objectstore numa_node 0 May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.444+0000 7fcf16aa2080 0 starting osd.2 osd_data /var/lib/ceph/osd/ceph-2 /var/lib/ceph/osd/ceph-2/journal May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.444+0000 7fcf16aa2080 -1 unable to find any IPv4 address in networks '10.0.199.0/24' interfaces '' May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.444+0000 7fcf16aa2080 -1 unable to find any IPv4 address in networks '172.16.199.0/24' interfaces '' May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.452+0000 7fcf16aa2080 0 load: jerasure load: lrc load: isa May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.456+0000 7fcf16aa2080 1 bdev(0x564ad476e400 /var/lib/ceph/osd/ceph-2/block) open path /var/lib/ceph/osd/ceph-2/block May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.456+0000 7fcf16aa2080 1 bdev(0x564ad476e400 /var/lib/ceph/osd/ceph-2/block) open size 500103643136 (0x7470800000, 466 GiB) block_size 4096 (4 KiB) non-rotational discard supported May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.456+0000 7fcf16aa2080 1 bluestore(/var/lib/ceph/osd/ceph-2) _set_cache_sizes cache_size 3221225472 meta 0.45 kv 0.45 data 0.06 May 14 16:58:56 dragon-ball-radar conmon[113957]: debug 2021-05-14T16:58:56.456+0000 7fcf16aa2080 1 bdev(0x564ad476e400 /var/lib/ceph/osd/ceph-2/block) close