== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 21:12:02 (1763345522)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17496     1253808   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       16372     1254932   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       30904     3576116   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       12656     3594364   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43560     7170480   1%  /mnt/lustre