== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 23:16:25 (1789614985)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       19316     1251988   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11896     1259408   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       20692     3586272   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       22912     3583996   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170268   1% /mnt/lustre