== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 23:30:51 (1789443051)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11156     1260148   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16036     1255268   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22992     3583944   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20612     3586352   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170296   1% /mnt/lustre