== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 14:44:13 (1790793853)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11412     1259892   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16020     1255284   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       23728     3583264   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19876     3587144   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170408   1% /mnt/lustre