Do you "own" the c drive? Usually companies don't want anything but os  on the c and put programs on d e f drive

It is usually better to place the Domino Directory tself on the D drive, and the data directory on the D drive.  This way, your program is running directly from teh C drive, and the datafiels are running fro the network.  If you should at some time wish to reconfigure the server, it will be simpler if the Data directory is on a separate drive.

I think that Bradley meant that the Domino program directory should be on C: and the data directory should be on D:. If this is what he meant then I agree.