I am trying to figure out how to set this configuration on my Hetzner server.
The hetzner installimage script provides a default configuration (with comments: http://pastebin.com/tBqezpFn):
# Onboard: Corsair CSSD-F120GB2
DRIVE1 /dev/sda
# Onboard: ST33000651AS
DRIVE2 /dev/sdb
# Onboard: ST33000651AS
DRIVE3 /dev/sdc
SWRAID 1
SWRAIDLEVEL 5
BOOTLOADER grub
HOSTNAME Debian-78-wheezy-64-minimal
PART swap swap 8G
PART /boot ext3 512M
PART / ext4 all
IMAGE //root/.oldroot/nfs/images/Debian-78-wheezy-64-minimal.tar.gz
and I would set up /dev/sda1 as root mount point, and a RAID1 with /dev/sdb & /dev/sdc as /home mount point.
To do this, I would comment out the SSD and set the two hdds as DRIVE1 & DRIVE2, and set SWRAIDLEVEL to 1.
At this point I haven't understand how (check the pastebin with comments if you're unfamiliar with the script) to set the mount points.