== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 19:27:17 (1787873237)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11524     1259780   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16312     1254992   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       26884     3580024   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       16720     3590076   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170100   1%  /mnt/lustre