== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 07:39:39 (1788521979)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17312     1253992   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9696     1261608   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24888     3582076   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18720     3588188   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170264   1% /mnt/lustre