== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 12:46:36 (1755103596)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      1414116       17256     1270432   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       23280     1264408   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       23264     3583756   1% /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       20972     3586048   1% /mnt/lustre[OST:1]

filesystem_summary:      7666232       44236     7169804   1% /mnt/lustre