== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 05:27:11 (1790933231)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11624     1259680   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       16408     1254896   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       22708     3584172   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       20900     3586036   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170208   1% /mnt/lustre