== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 15:31:44 (1789068704)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11368     1259936   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16116     1255188   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25968     3580968   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       17636     3589160   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170128   1% /mnt/lustre