== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:32:03 (1787844723)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11504     1259800   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16120     1255184   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       31044     3575920   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12560     3594404   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170324   1%  /mnt/lustre