== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 23:34:24 (1761968064)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       15688     1255616   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       21596     1249708   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       30628     3576392   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       13992     3593028   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       44620     7169420   1%  /mnt/lustre