== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 21:30:14 (1777426214)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       22740     1248564   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       19892     1251412   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       27692     3579328   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       17668     3589352   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45360     7168680   1%  /mnt/lustre