To install edgy on dmraid is tricky at best. I put together a HOWTO that's worked for me and a couple others here:
http://ubuntuforums.org/showpost.php?p=1708724&postcount=11 -- DMRAID stopped to work in kernels > 2.6.15 https://launchpad.net/bugs/54246 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
