== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 10:43:23 (1758811403)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210176       13824     2194304   1% /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       22528     3746816   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       27648     3741696   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       50176     7488512   1% /mnt/lustre