== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 20:49:46 (1755046186)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       24164     1263524   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21504     1266184   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       28516     3578504   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       16256     3590764   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44772     7169268   1% /mnt/lustre