== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 22:46:59 (1778294819)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       23272     1248032   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       19860     1251444   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       24944     3582076   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       20676     3586312   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45620     7168388   1%  /mnt/lustre