== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 22:38:50 (1786761530)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17480     1253824   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9984     1261320   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25768     3581252   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       17832     3589160   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43600     7170412   1%  /mnt/lustre