Software RAID

I'm in the process of testing Linux Software RAID. My goal is to take
an array in one distro and access it from other distro's. Where is the
best site for info? I currently have the array built with RH9, plan to
kill (not the array) and try MDK9.1, Gentoo, Debian (woody), and Slack.
I've found stuff on linas.org but I need more rudimentary info.

I eventually will have a distro up that will use it and I need the
recovery practice.
Thanks