== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:02:53 (1787583773)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       12928     1258376   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       18036     1253268   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       29012     3577980   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       14596     3592396   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170376   1% /mnt/lustre