== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 18:21:17 (1743459677)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       19368     1268320   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       26588     1261100   3% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       30624     3576396   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       14620     3592400   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       45244     7168796   1% /mnt/lustre