== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 05:56:30 (1788515790)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2210048        7808     2200192   1% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       23552     3741696   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       24576     3737600   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       48128     7479296   1% /mnt/lustre