== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 05:49:29 (1747216169)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       23908     1263780   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21236     1266452   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       26624     3580396   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       18420     3588600   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       45044     7168996   1% /mnt/lustre