== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:55:14 (1788623714)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       19236     1252068   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11852     1259452   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       29096     3577868   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       14508     3592428   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170296   1% /mnt/lustre