== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 01:25:02 (1789277102)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11148     1260156   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16148     1255156   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22612     3584324   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20992     3585888   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170212   1% /mnt/lustre