== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 19:11:43 (1775171503)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       24912     1246392   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21836     1249468   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       29052     3577912   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       16612     3590408   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45664     7168320   1%  /mnt/lustre