== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 19:22:17 (1788650537)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2210048        8064     2199936   1% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       22528     3742720   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       25600     3738624   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       48128     7481344   1% /mnt/lustre