Hi, As an exercise, I killed an OSD today, just killed the process and removed its data directory. To recreate it, I recreated an empty data dir, then ceph-osd -c /etc/ceph/ceph.conf -i 3 --monmap /tmp/monmap --mkfs (I tried with and without giving the monmap). I then restored the keyring file (from a backup) in the /var/lib/osd/ceph-3/keyring And then I start the process, and it starts fine. http://pastebin.com/TPzNth6P I even see one active tcp connection to a mon from that process. But the osd never becomes "up" or do anything ... Cheers, Sylvain
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