== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 11:22:14 (1766420534)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       19900     1251404   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       25468     1245836   3%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       28060     3578960   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       17604     3589416   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45664     7168376   1%  /mnt/lustre