Hello,

I have a Ceph cluster created by orchestrator Cephadm. It consists of 3 Dell 
PowerEdge R730XD servers. This cluster's hard drives used as OSD were 
configured as RAID 0. The configuration summery is as the following:
ceph-node1 (mgr, mon)
  Public network: 172.16.7.11/22
  Cluster network: 10.10.10.11/24, 10.10.10.14/24
ceph-node2 (mgr, mon)
  Public network: 172.16.7.12/22
  Cluster network: 10.10.10.12/24, 10.10.10.15/24
ceph-node3 (mon)
  Public network: 172.16.7.13/22
  Cluster network: 10.10.10.13/24, 10.10.10.16/24

Recently I removed all OSDs from node3 with the following set of commands
  sudo ceph osd out osd.3
  sudo systemctl stop ceph@osd.3.service
  sudo ceph osd rm osd.3
  sudo ceph osd crush rm osd.3
  sudo ceph auth del osd.3

After this, I configured all OSD hard drives as non-RAIN from the server 
settings and tried to add the hard drives as OSD again. First I used the 
following command to add them automatically
  ceph orch apply osd --all-available-devices --unmanaged=false
But this was generating the following error in my Ceph GUI console
  CEPHADM_APPLY_SPEC_FAIL: Failed to apply 1 service(s): 
osd.all-available-devices
I am also unable to add the hard drives manually with the following command
  sudo ceph orch daemon add osd ceph-node3:/dev/sdb

Can anyone please help me with this issue?

I really appreciate any help you can provide.
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