[tlug] Reinstall on a RAID system

[Dave M G <dave@example.com>]

TLUG,

I'm having trouble upgrading from Ubuntu 8.10 to 9.04. I got halfway 
into the automated update process and it bailed, leaving my system unstable.
Since I have everything backed up, I thought I would just reinstall from 
CD and make a clean slate of things.
Also, my home directory is a different partition, so ideally I'd leave 
it alone and only format and install into the root partition.
The problem is that I have two hard drives configured into a software 
driven RAID array. I can't install with the regular install CD because 
it sees all the partitions on both drives as separate entities.
I downloaded the "alternate" install CD which allows me to set up a RAID 
system, but I can't discern if or how it is possible to isolate the root 
partition for installation only and leave my home directory intact.
Google isn't quite helping either. I might be using the wrong search 
terms, or maybe what I am doing is impossible?
Can I achieve what I'm trying to do without having to completely 
repartition and do the whole RAID setup from scratch again?
Thanks for any advice.


--
Dave M G
http://tlug.jp/mediawiki/index.php?title=User:Dave_M_G