== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 22:10:14 (1787796614)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17776     1253528   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10124     1261180   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       21668     3585184   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       21928     3584644   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43596     7169828   1%  /mnt/lustre