Here is the export parameters I am using.
file=nash%1.dmp log=nash%1.log full=y consistent=y

I am taking the default buffer values.

What issues are you seeing with DIRECT?

We are running a raid 5 and I am exporting the file to a seperate logical drive than my data and index files. Only thing on this logical drive is my exports and some historical files.

My box is running 2, p3-400's and i have about 120 users. I am exporting at 10AM which is a busy time, but not our busiest times. We do have no hardware and are going to be upgrading to 9i on it. Just waiting on the vendor for the app.

I just need to reduce the CPU hit and the time it takes to do the export.