== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 11:06:36 (1761145596)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17592     1270096   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       24608     1263080   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       21204     3585704   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       23744     3583276   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       44948     7168980   1%  /mnt/lustre