== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 12:11:36 (1787328696)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17544     1253760   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9988     1261316   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       23736     3583284   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19868     3587152   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170436   1%  /mnt/lustre