== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 04:42:06 (1789375326)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17568     1253736   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10052     1261252   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       29864     3577156   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       13740     3593280   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43604     7170436   1% /mnt/lustre