== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 22:29:45 (1763350185)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       17132     1254172   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       15884     1255420   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       30224     3576320   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       13336     3593600   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43560     7169920   1%  /mnt/lustre