== sanity test 56db: test 'lfs df -m' only shows MDT devices ========================================================== 15:08:22 (1767730102)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210304       12032     2196224   1%  /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       88064     3676160   3%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3771392       26624     3735552   1%  /mnt/lustre[OST:1]

filesystem_summary:      7542784      114688     7411712   2%  /mnt/lustre