== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 02:00:59 (1788847259)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11632     1259672   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16416     1254888   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24684     3582336   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18920     3588016   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170352   1% /mnt/lustre