== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 23:37:06 (1772426226)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       19768     1251536   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       26896     1244408   3%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       27932     3579088   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       17708     3589312   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45640     7168400   1%  /mnt/lustre