== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 16:11:39 (1746130299)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210432       12160     2196224   1% /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       22528     3746816   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       23552     3745792   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       46080     7492608   1% /mnt/lustre