== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 21:44:32 (1763088272)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17120     1254184   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       24136     1247168   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       26604     3580416   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       17976     3589044   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       44580     7169460   1%  /mnt/lustre