use DD mode or not? and how to set up?

[Tom Worster]

options for setting up gmirror include DD or standard mode. i don't know
about others.

i'm about to install 8.0-RELEASE on a system with two 750g sata disks that i
want to run as a mirrored pair.

what are the pros/cons of the different options?

and what about the installation process? set up the mirror before installing
from the CD or do it like the handbook says?