== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:44:20 (1787921060)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17724     1253580   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10252     1261052   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24932     3582032   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18676     3588288   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170320   1% /mnt/lustre