== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 19:18:14 (1756682294)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       15572     1272116   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21800     1265888   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       26616     3580404   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       17924     3589096   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44540     7169500   1% /mnt/lustre