== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 09:24:07 (1746797047)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       21032     1266656   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       18972     1268716   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       23348     3583672   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       20832     3586188   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44180     7169860   1% /mnt/lustre