== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 10:42:34 (1788187354)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210048        7808     2200192   1%  /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       23552     3727360   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       24576     3735552   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       48128     7462912   1%  /mnt/lustre