== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 22:14:07 (1783649647)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17120     1254184   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       20292     1251012   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25096     3581924   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20556     3586464   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       45652     7168388   1%  /mnt/lustre