== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 04:30:53 (1789029053)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17472     1253832   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10096     1261208   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       23960     3583060   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       19644     3587348   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170408   1% /mnt/lustre