[gentoo-user] software raid, mdadm is not finding disks

[Dave]

Hello,
	I'm a new user trying out Gentoo though not a new Linux user. I
wanted to try software raid1. I've got only one machine so this had to go in
to a virtual machine, i installed from the 2008 minimal iso image, the
install went fine, while chrooted /dev/md* devices were working fine, fdisk,
mke2fs, and software installs all worked fine. Upon reboot i'm seeing mdadm
trying to detect the two disks, and not succeeding, therefor unable to mount
/dev/md3 and i'm getting a kernel panic. The disks are /dev/sda and /dev/sdb
two scsi disks on a virtual LSI controller. 
	I then thought boot with the minimal iso again, which i did and
atempt to mount /dev/md3 manually. I'm getting an error that i must specify
the filesystem type and when i do type mdraid is unknown. Any help welcome.
Thanks.
Dave.