== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 10:24:11 (1787840651)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17688     1253616   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10008     1261296   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22980     3583760   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20616     3586292   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43596     7170052   1%  /mnt/lustre