== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 19:45:42 (1775778342)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       15608     1255696   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       20928     1250376   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       24052     3582828   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       19548     3587332   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43600     7170160   1%  /mnt/lustre