== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:28:24 (1789140504)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11332     1259972   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16152     1255152   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       30800     3576080   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       12816     3594036   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43616     7170116   1%  /mnt/lustre