== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 07:29:39 (1743506979)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       18268     1269420   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       15252     1272436   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116      545700     3061320  16% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116      530072     3076948  15% /mnt/lustre[OST:1]

filesystem_summary:      7666232     1075772     6138268  15% /mnt/lustre