== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 20:46:51 (1789087611)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11132     1260172   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       15996     1255308   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24104     3582888   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19512     3587508   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43616     7170396   1%  /mnt/lustre