== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 11:19:06 (1758813546)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       19052     1268636   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       26032     1261656   3% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       30324     3576696   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       14216     3592804   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44540     7169500   1% /mnt/lustre