== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 15:40:31 (1752522031)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       17340     1270348   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       16084     1271604   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       32244     3574776   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       11276     3595744   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       43520     7170520   1% /mnt/lustre