After trying to restart the mds master, it also failed. Now the cluster state is : # ceph status cluster: id: dd024fe1-4996-4fed-ba57-03090e53724d health: HEALTH_WARN 1 filesystem is degraded insufficient standby MDS daemons available 29 daemons have recently crashed services: mon: 3 daemons, quorum 2,0,1 (age 2d) mgr: mgr.0(active, since 10d), standbys: mgr.2, mgr.1 mds: cephfs:1/1 {0=node1=up:replay(laggy or crashed)} osd: 3 osds: 3 up (since 32h), 3 in (since 10d) data: pools: 3 pools, 49 pgs objects: 29 objects, 203 KiB usage: 3.0 GiB used, 41 TiB / 41 TiB avail pgs: 49 active+clean PS: The cluster in on Centos 7 Thanks, _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx