== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 14:53:46 (1786042426)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11272     1260032   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16204     1255100   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       31184     3575780   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12420     3594572   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170352   1%  /mnt/lustre