== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 18:50:22 (1775861422)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       16280     1255024   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21376     1249928   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       32256     3574764   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       11292     3595728   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43548     7170492   1%  /mnt/lustre