OK, I'm planning my companies brand new Windows 2003 AD domain with new servers and the whole 9 yards. Here is my question my company has >100 employees I plan on out sourcing Exchange. I was planning on ordering 2x DL360 G5 3.0Ghz 4GB of Ram 2x 72GB SAS hard drives for the OS (mirror) & 2 72GB + 1 hot spare for AD database. Does this sounds about right for the sizeing of these two Active Directory controllers. Also should I setup the database on another drive besides the C:\ and just keep the c:\ for the OS and that's it??