== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 08:16:07 (1789301767)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       19244     1252060   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       11752     1259552   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       24880     3582112   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       18728     3588264   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170376   1% /mnt/lustre