== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 03:39:09 (1788853149)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11872     1259432   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16228     1255076   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22724     3584240   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20880     3586056   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170296   1% /mnt/lustre