Hi, I am trying to map a rbd device in Ubuntu 14.04 (kernel 3.13.0-30-generic): # rbd -p mypool create test1 --size 500 # rbd -p mypool ls test1 # rbd -p mypool map test1 rbd: add failed: (5) Input/output error and in the syslog: Jul 4 09:31:48 testceph kernel: [70503.356842] libceph: mon2 172.16.64.18:6789 feature set mismatch, my 4a042a42 < server's 2004a042a42, missing 20000000000 Jul 4 09:31:48 testceph kernel: [70503.356938] libceph: mon2 172.16.64.18:6789 socket error on read my environment: cluster version on all MONs and OSDs is 0.80.1 In the client machine: ii ceph-common 0.80.1-1trusty amd64 common utilities to mount and interact with a ceph storage cluster ii python-ceph 0.80.1-1trusty amd64 Python libraries for the Ceph distributed filesystem ii librados2 0.80.1-1trusty amd64 RADOS distributed object store client library I think I started getting this error when I switched from tunables legacy to optimal after upgrading from 0.72 to 0.80. Thanks in advance!
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