== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 17:32:13 (1788211933)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11284     1260020   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16036     1255268   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25028     3581544   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18564     3588372   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43592     7169916   1% /mnt/lustre