sid:~# /opt/e2fsprogs/sbin/debugfs -w /dev/md0 debugfs 1.41.5 (23-Apr-2009) debugfs: clri <12272> debugfs: kill_file <12272> debugfs: cd lost+found debugfs: pwd [pwd] INODE: 11 PATH: /lost+found [root] INODE: 2 PATH: / debugfs: ls 11 (12) . 2 (12) .. 12284 (16) #12284 12292 (16) #12292 12117 (16) #12117 12118 (16) #12118 12152 (16) #12152 12153 (16) #12153 12195 (16) #12195 12196 (16) #12196 12206 (16) #12206 12219 (16) #12219 12220 (16) #12220 12248 (16) #12248 12269 (16) #12269 12271 (16) #12271 12272 (16) #12272 12273 (16) #12273 12283 (16) #12283 12289 (16) #12289 12290 (16) #12290 12291 (16) #12291 12298 (16) #12298 12299 (3736) #12299 0 (4096) 0 (4096) 0 (4096) debugfs: rm #12272 ^D sid:~# mount -t ext4 /dev/md0 /mnt/md0 mount: /dev/md0 already mounted or /mnt/md0 busy mount: according to mtab, /dev/md0 is already mounted on /mnt/md0 <--- Whoops! sid:~# umount /mnt/md0 sid:~# mount -t ext4 /dev/md0 /mnt/md0 sid:~# ls -lah /mnt/md0/ total 28K drwxr-xr-x 4 root root 4.0K Apr 24 22:25 . drwxr-xr-x 4 root root 4.0K Apr 2 13:39 .. drwxr-xr-x 23 dummy users 4.0K Apr 24 11:46 linux-2.6-git drwx------ 4 root root 16K Apr 24 22:25 lost+found sid:~# ls -lah /mnt/md0/lost+found/ ls: cannot access /mnt/md0/lost+found/#12152: Input/output error ls: cannot access /mnt/md0/lost+found/#12271: Input/output error total 76K p--S------ 1 806683644 4233172690 0 Apr 20 1974 #12117 prw---s--- 1 940852125 270124033 0 Aug 12 2005 #12118 [...] sid:~# umount /mnt/md0 sid:~# /opt/e2fsprogs/sbin/fsck.ext4 /dev/md0 e2fsck 1.41.5 (23-Apr-2009) /dev/md0 contains a file system with errors, check forced. Pass 1: Checking inodes, blocks, and sizes Inode 12272 is in use, but has dtime set. Fix? yes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Inode 12272 (...) has invalid mode (00). Clear? yes Pass 5: Checking group summary information /dev/md0: ***** FILE SYSTEM WAS MODIFIED ***** /dev/md0: 29591/244320 files (0.0% non-contiguous), 223790/975888 blocks sid:~# mount -t ext4 /dev/md0 /mnt/md0 sid:~# ls -la /mnt/md0/lost+found/ ls: cannot access /mnt/md0/lost+found/#12152: Input/output error ls: cannot access /mnt/md0/lost+found/#12271: Input/output error total 76 [...]