also a new build.Not catching on this. New build of ePO?
but now the log file of epo_db. grows at 1gb a minute till it fills the disk
That's almost certainly some type of run-away / looping process.
Traces aren't normally needed that much anymore, but it would probably be a good idea to do one here. You should be able to see the bad process that is just running over and over, when it shouldn't, then correct it.
this is a reinstall.So you reinstalled ePO and the issue is still there?
Use the Simple recovery model for your database. The Simple recovery model allows SQL to manage the transaction log for you, which avoids future transaction log growth.