Hi, if you want to be nice/free of interruption, you should consider adding the new mon/osd to your existing cluster, let it sync, and then remove the old mon/osd. So this is an add/remove task, not a 1:1 replace. You will need to copy the data from your existing harddisks anyway. Greetings Oliver _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com