Hi, We used to have 0.80.1 on Ubuntu 12.04. We recently upgraded to 14.04. However the mon process doesn't start while OSDs are ok. The ceph-mon log shows, 2014-07-14 12:04:17.034407 7fa86ddcb700 -1 mon.storage1 at 0(electing).elector(147) Shutting down because I do not support required monitor features: { compat={},rocompat={},incompat={} } Any suggestions? Thanks, Richard -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140714/9583d5c5/attachment.htm>