daunderground@ubuntu:/$ sudo fsck.ext4 /dev/md0
e2fsck 1.42 (29-Nov-2011)
/dev/md0: recovering journal
Setting free inodes count to 244160611 (was 244163881)
Setting free blocks count to 20288996 (was 21977680)
/dev/md0: clean, 18333/244178944 files, 956401948/976690944 blocks