== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:42:47 (1788525767)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17892     1253412   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10188     1261116   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       31156     3575724   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12448     3594376   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170100   1% /mnt/lustre