== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 07:37:20 (1769085440)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       14140     1257164   2%  /mnt/lustre[MDT:0]
lustre-MDT0001_UUID      1414116       19804     1251500   2%  /mnt/lustre[MDT:1]
lustre-OST0000_UUID      3833116       20884     3586136   1%  /mnt/lustre[OST:0]
lustre-OST0001_UUID      3833116       22664     3584356   1%  /mnt/lustre[OST:1]

filesystem_summary:      7666232       43548     7170492   1%  /mnt/lustre