== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 22:33:28 (1788575608)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17472     1253832   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10080     1261224   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24948     3581960   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18660     3588276   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170236   1% /mnt/lustre