== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 06:47:14 (1789296434)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2210048        8192     2199808   1% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       23552     3741696   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       24576     3729408   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       48128     7471104   1% /mnt/lustre