== sanity test 56Db: test 'lfs df -m' only shows MDT devices ========================================================== 17:38:55 (1789076335)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17564     1253740   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116        9904     1261400   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24056     3582936   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19536     3587372   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43592     7170308   1% /mnt/lustre