== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 20:43:01 (1772761381)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210432       13696     2194688   1%  /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       24576     3744768   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       28672     3740672   1%  /mnt/lustre[OST:1]

filesystem_summary:      7542784       53248     7485440   1%  /mnt/lustre