== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 21:43:36 (1733798616)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       22280     1265408   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       20548     1267140   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116      543852     3063168  16% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116      532780     3074240  15% /mnt/lustre[OST:1]

filesystem_summary:      7666232     1076632     6137408  15% /mnt/lustre