== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:41:03 (1789648863)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       19496     1251808   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11976     1259328   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       20964     3586028   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       22644     3584376   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170404   1% /mnt/lustre