== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 22:53:44 (1789613624)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11456     1259848   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16144     1255160   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       21896     3585068   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       21712     3585252   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170320   1% /mnt/lustre