== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 10:44:47 (1770651887)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       25076     1262612   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       22004     1265684   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       24900     3582120   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       20756     3586264   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45656     7168384   1%  /mnt/lustre