== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 11:18:48 (1746631128)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       22888     1264800   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       20300     1267388   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       21860     3585160   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       22288     3584732   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44148     7169892   1% /mnt/lustre