Hi, I have a rook cluster running with ceph 12.2.7 for almost one year. Recently some pvc couldn’t be attached with error as below, Warning FailedMount 7m19s kubelet, 192.168.34.119 MountVolume.SetUp failed for volume "pvc-8f4ca7ac-42ab-11ea-99d7-005056b84936" : mount command failed, status: Failure, reason: failed to mount volume /dev/rbd1 [ext4] to /var/lib/kubelet/plugins/rook.io/rook-ceph/mounts/pvc-8f4ca7ac-42ab-11ea-99d7-005056b84936, error 'fsck' found errors on device /dev/rbd1 but could not correct them: fsck from util-linux 2.23.2 /dev/rbd1: recovering journal /dev/rbd1 contains a file system with errors, check forced. /dev/rbd1: Inode 393244, end of extent exceeds allowed value (logical block 512, physical block 12091904, len 4388) After mapping storage to block device and run "fsck -y" on it, it indicated that filesystem was clean. Then retry to mount the storage, it still reported the same error as above. Response from "ceph status” is as below, cluster: id: 54a729b6-7b59-4e5b-bc09-7dc99109cbad health: HEALTH_WARN noscrub,nodeep-scrub flag(s) set Degraded data redundancy: 50711/152133 objects degraded (33.333%), 100 pgs degraded, 100 pgs undersized mons rook-ceph-mon41,rook-ceph-mon44 are low on available space services: mon: 3 daemons, quorum rook-ceph-mon44,rook-ceph-mon47,rook-ceph-mon41 mgr: a(active) osd: 3 osds: 3 up, 3 in flags noscrub,nodeep-scrub data: pools: 1 pools, 100 pgs objects: 50711 objects, 190 GB usage: 383 GB used, 1111 GB / 1495 GB avail pgs: 50711/152133 objects degraded (33.333%) 100 active+undersized+degraded io: client: 78795 B/s wr, 0 op/s rd, 11 op/s wr From output, why is scrub disabled? Could I trigger it manually? And how could I check which pgs or objects is corrupted? Any advice for fixing the issue? Thanks for your help. Jared