== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 07:43:45 (1788522225)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       19184     1252120   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11820     1259484   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       29116     3577848   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       14488     3592504   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170352   1%  /mnt/lustre