== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 13:49:21 (1789148961)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11740     1259564   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16244     1255060   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       25780     3581184   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       17836     3589072   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43616     7170256   1%  /mnt/lustre