== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 22:07:51 (1788574071)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17652     1253652   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9904     1261400   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       28772     3578136   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       14836     3592100   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170236   1% /mnt/lustre