== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 21:47:46 (1772765266)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       19032     1252272   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       17480     1253824   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       26660     3580360   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       16884     3590136   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43544     7170496   1%  /mnt/lustre