== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 13:34:41 (1787592881)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       13304     1258000   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       18280     1253024   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       20680     3586200   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       22908     3583832   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43588     7170032   1% /mnt/lustre