== sanity test 56Dc: test 'lfs df -o' only shows OST devices ========================================================== 16:17:25 (1788553045)
UUID                   1K-blocks        Used   Available Use% Mounted on 
lustre-MDT0000_UUID      1414116       17444     1253860   2% /mnt/lustre[MDT:0] 
lustre-MDT0001_UUID      1414116       10136     1261168   1% /mnt/lustre[MDT:1] 
lustre-OST0000_UUID      3833116       26028     3580712   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3833116       17564     3589344   1% /mnt/lustre[OST:1] 

filesystem_summary:      7666232       43592     7170056   1% /mnt/lustre