== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 13:33:00 (1789147980)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       11064     1260240   1% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       15984     1255320   2% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       21856     3585108   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       21752     3585240   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43608     7170348   1% /mnt/lustre