== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 22:57:36 (1767326256)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       19880     1251424   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       27052     1244252   3%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       21748     3585272   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       23820     3583200   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45568     7168472   1%  /mnt/lustre