== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 12:39:39 (1790786379)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       13200     1258104   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       18108     1253196   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       28068     3578924   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       15536     3591484   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170408   1% /mnt/lustre