== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 10:46:59 (1753368419)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210304       12032     2196224   1% /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       22528     3746816   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       25600     3743744   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       48128     7490560   1% /mnt/lustre