I'm in the process of installing a Debian Testing AMD64 on a brand new
server. Almost everything goes fine, but it seems I can't crate a
software RAID volume from the install CD. I've done this before with
Sarge Install CD on an older x86 server, by using the MD module iirc.
The server sports 4 SATA HD (Raptor). I want to make a RAID 5 with 3 of
them, and keep the last one as a spare.

Any way to do this from the "testing" AMD64 install CD ?

the server:

dmesg output: