== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 13:40:54 (1744134054)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       17780     1269908   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       24688     1263000   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       29388     3577632   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       14776     3592244   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44164     7169876   1% /mnt/lustre