== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 12:35:43 (1786984543)
UUID                   1K-blocks        Used   Available Use%  Mounted on
lustre-MDT0000_UUID      2210048        8192     2199808   1%  /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       21504     3735552   1%  /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       26624     3733504   1%  /mnt/lustre[OST:1] 

filesystem_summary:      7542784       48128     7469056   1%  /mnt/lustre