== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 13:17:19 (1789147039)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17376     1253928   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9936     1261368   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25884     3581080   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       17732     3589232   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43616     7170312   1%  /mnt/lustre