== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 06:27:19 (1789036039)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11536     1259768   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16168     1255136   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       28872     3578092   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       14732     3592232   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170324   1% /mnt/lustre