== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 23:27:26 (1767328046)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       20396     1250908   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       27716     1243588   3%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       23008     3584012   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       22656     3584364   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45664     7168376   1%  /mnt/lustre