== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 10:04:55 (1748873095)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       16980     1270708   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       23284     1264404   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       21320     3585700   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       22844     3584176   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44164     7169876   1% /mnt/lustre