== sanity test 56dc: test 'lfs df -o' only shows OST devices ========================================================== 13:06:31 (1731348391)
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID      2210432       24960     2183424   2% /mnt/lustre[MDT:0]
lustre-OST0000_UUID      3771392       30720     3738624   1% /mnt/lustre[OST:0] 
lustre-OST0001_UUID      3771392       25600     3743744   1% /mnt/lustre[OST:1]

filesystem_summary:      7542784       56320     7482368   1% /mnt/lustre