== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 09:04:06 (1775048646)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       23360     1247944   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       22492     1248812   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       29764     3577256   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       15840     3591180   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       45604     7168436   1%  /mnt/lustre