== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 18:36:54 (1764805014)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       13644     1257660   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       19008     1252296   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       31104     3575916   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       12428     3594592   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43532     7170508   1%  /mnt/lustre