== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 04:09:36 (1761293376)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       15952     1255352   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21404     1249900   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       29876     3576724   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       13712     3593168   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43588     7169892   1%  /mnt/lustre