== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 12:43:47 (1746117827)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       23356     1264332   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       20520     1267168   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       21024     3585996   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       23312     3583708   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44336     7169704   1% /mnt/lustre