== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 17:36:50 (1760132210)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       18360     1269328   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       25828     1261860   3% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       22768     3584252   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       22868     3584152   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       45636     7168404   1% /mnt/lustre