Debian Sparc installer with raid 1 support

["Richard Marshall" <rich@rainbowstreet.org>]

Hello,
 
I am hoping for a little advice. I am trying to install debian on 2 Sun machines, a Netra x1 and an E420r. What I'd like to be able to do is create a raid mirror with the disks before the system is installed. i.e. install debain onto a mirror, rather than creating the mirror after the install.
 
I have been using some of the latest installers and notice that there is now an option within the partitioning menu to create software raid, when I select this option I am told that the kernel does not support it. 
 
Is there a Sparc installer out there that has the software raid partitioning option, and a kernel that will support it? If there is no installer available at present, how long am I likely to have to wait before one appears, and where is it likely to turn up?
 
Thanks in advance for any help that can be offered.
 
Regards
 
Richard