== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 12:02:49 (1787328169)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      1414116       19240     1252064   2%  /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11756     1259548   1%  /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       20552     3586440   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       23052     3583940   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170380   1%  /mnt/lustre