== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 11:40:01 (1787586001)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       19576     1251728   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11940     1259364   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       27836     3579184   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       15772     3591220   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170404   1% /mnt/lustre