== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 10:59:21 (1789138761)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210176        8448     2199680   1%  /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       22528     3718144   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       25600     3738624   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       48128     7456768   1%  /mnt/lustre