== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 04:04:36 (1773216276)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       15420     1255884   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       16152     1255152   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       20936     3585888   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       22664     3584216   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43600     7170104   1%  /mnt/lustre