== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 21:48:40 (1770691720)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       15164     1256140   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21152     1250152   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       31872     3575148   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       11672     3595348   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43544     7170496   1%  /mnt/lustre