Hi, I extracted a disk with two partitions (journal and data) and copied its content in the hope to restart the OSD and recover its content. mount /dev/sdb1 /mnt rsync -avH --numeric-ids /mnt/ /var/lib/ceph/osd/ceph-$(cat /mnt/whoami)/ rm /var/lib/ceph/osd/ceph-$(cat /mnt/whoami)/journal dd if=/dev/sdb2 of=/var/lib/ceph/osd/ceph-$(cat /mnt/whoami)/journal and then start ceph-osd id=$(cat /mnt/whoami) It crashes on https://github.com/ceph/ceph/blob/v0.72.2/src/osd/PG.cc#L2182 and before it happens there is load_pgs ignoring unrecognized meta and the full "debug osd = 20" logs are in http://paste.ubuntu.com/7746993/ and this is root at bm4202:/etc/ceph# dpkg -l | grep ceph ii ceph 0.72.2-1trusty amd64 distributed storage and file system ii ceph-common 0.72.2-1trusty amd64 common utilities to mount and interact with a ceph storage ii python-ceph 0.72.2-1trusty amd64 Python libraries for the Ceph distributed filesystem root at bm4202:/etc/ceph# ceph --version ceph version 0.72.2 (a913ded2ff138aefb8cb84d347d72164099cfd60) Cheers -- Lo?c Dachary, Artisan Logiciel Libre -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 263 bytes Desc: OpenPGP digital signature URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140704/52647adb/attachment.pgp>