== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 23:45:52 (1789789552)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       13504     1257800   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16256     1255048   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25868     3580788   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       17708     3589144   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43576     7169932   1% /mnt/lustre