== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 10:11:57 (1788790317)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       19540     1251764   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11640     1259664   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       26976     3580016   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       16628     3590392   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170408   1% /mnt/lustre