== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 19:43:40 (1790984620)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11384     1259920   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       15888     1255416   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       26916     3580076   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       16688     3590304   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170380   1% /mnt/lustre