== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 04:54:18 (1788944058)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17216     1254088   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9652     1261652   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       20796     3586224   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       22808     3584072   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170296   1% /mnt/lustre