== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 03:36:36 (1733646996)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       20796     1266892   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       18404     1269284   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116      540224     3066796  15% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116      535288     3071732  15% /mnt/lustre[OST:1]

filesystem_summary:      7666232     1075512     6138528  15% /mnt/lustre