== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 17:41:35 (1760132495)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       18024     1269664   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       24844     1262844   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       30904     3576116   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       14688     3592332   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       45592     7168448   1% /mnt/lustre