== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 12:44:34 (1783961074)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       19340     1251964   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11852     1259452   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       21996     3585024   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       21604     3585388   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43600     7170412   1%  /mnt/lustre