== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 19:09:12 (1761260952)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17232     1254072   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       16076     1255228   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       25884     3581052   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       17708     3589060   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43592     7170112   1%  /mnt/lustre