== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 16:58:28 (1790110708)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17244     1254060   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9532     1261772   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       32144     3574876   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       11460     3595532   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170408   1% /mnt/lustre