== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 13:39:05 (1744133945)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       17320     1270368   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       23844     1263844   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       31292     3575728   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       12856     3594164   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44148     7169892   1% /mnt/lustre