== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 03:44:56 (1788853496)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11712     1259592   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16408     1254896   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       28792     3578172   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       14816     3592120   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170292   1% /mnt/lustre