== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 04:30:07 (1789461007)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17556     1253748   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10124     1261180   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22704     3584176   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20892     3586044   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43596     7170220   1% /mnt/lustre