== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 00:27:52 (1788841672)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      2210048        8192     2199808   1% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID      3771392       23552     3736576   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       24576     3740672   1% /mnt/lustre[OST:1] 

filesystem_summary:      7542784       48128     7477248   1% /mnt/lustre