== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 12:13:18 (1775837598)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       18128     1253176   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       25136     1246168   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       27956     3579064   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       17716     3589304   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45672     7168368   1%  /mnt/lustre