Hi, i suggest: at least update kernel. at best update/migrate (to a whole) recent ubuntu. Your 12.04 LTS is from 2012. Maybe after you skipped the 14.04 LTS, you should go on the 16.04 LTS with 4.4 Kernel. If the kernel is already so talkative to tell you that missing features are the problem, you eighter install more recent software to support it. Or you deactivate that features ( which is i think the less good idea when it comes to default features within a filesystem ). -- Mit freundlichen Gruessen / Best regards Oliver Dzombic IP-Interactive mailto:info@xxxxxxxxxxxxxxxxx Anschrift: IP Interactive UG ( haftungsbeschraenkt ) Zum Sonnenberg 1-3 63571 Gelnhausen HRB 93402 beim Amtsgericht Hanau Geschäftsführung: Oliver Dzombic Steuer Nr.: 35 236 3622 1 UST ID: DE274086107 Am 02.04.2016 um 10:50 schrieb Loic Dachary: > Redirecting to the ceph user mailing list. > > On 02/04/2016 05:48, mansour amini wrote: >> >> >> On Sunday, March 27, 2016 3:38 PM, mansour amini <ms_amini2003@xxxxxxxxx> wrote: >> >> >> hello >> >> I want to mount ceph fs with the kernel driver, but when I execute below command on my admin node >> >> |mount -t ceph 192.168.0.164:6789:/ /mnt/mycephfs | >> >> it return below error >> >> |mount error 5 = Input/output error | >> >> and dmesg output is: >> >> |libcph: mon0 192.168.0.164:6789 feature set mismatch, my 8a < server's 4204008a, missing 42040000 libcph: mon0 192.168.0.164:6789 missing requird protocol features | >> >> My OS is Ubuntu 12.04 (precise) and my kernel version is 3.2.0-98 and I use latest ceph release for precise (0.94.6) >> >> I check my MDS server and it is up and running well I think, and my cluster status is active+clean. >> >> Thanks >> >> >> >> >> _______________________________________________ >> Ceph-community mailing list >> Ceph-community@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-community-ceph.com >> > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com