== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 14:15:04 (1726856104)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210432       20352     2188032   1% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      2210432       17408     2190976   1% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3771392       35840     3733504   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       20480     3748864   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       56320     7482368   1% /mnt/lustre