== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 19:34:31 (1786836871)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       12224     1259080   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16780     1254524   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       29848     3577172   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       13704     3593316   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43552     7170488   1%  /mnt/lustre