== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 21:40:13 (1768012813)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       18204     1253100   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       27788     1243516   3%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       30024     3576996   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       15644     3591376   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45668     7168372   1%  /mnt/lustre