== sanity test 56Db: test 'lfs df -m' only shows MDT devices ========================================================== 19:33:15 (1788651195)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       19300     1252004   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       12092     1259212   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       23688     3583332   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19868     3587152   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43556     7170484   1% /mnt/lustre