== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 01:59:29 (1789451969)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       13132     1258172   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16028     1255276   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       23704     3583176   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19900     3587064   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170240   1% /mnt/lustre