== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 02:33:37 (1788849217)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17520     1253784   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10032     1261272   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       20964     3586028   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       22644     3584348   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170376   1% /mnt/lustre