== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 04:19:18 (1787127558)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       11616     1259688   1%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16380     1254924   2%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       26816     3580092   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       16780     3589988   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43596     7170080   1%  /mnt/lustre