== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 12:21:09 (1780330869)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       18476     1252828   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11672     1259632   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24092     3582732   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19512     3587032   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7169764   1%  /mnt/lustre