After a bit more investigation it turned out to be more related to the order things were started on my system. Renaming the dmraid script to zdmraid (so it's last in the sort order) seems to have helped on my system.
If I did break=mount I could manually run dmraid -ay, and everything would be fine, but a normal boot did not work. It seems to be related to either time (something had not fully loaded yet), or order (a pre-req was not loaded yet). I don't know for certain yet, but I have a system now that boots perfectly on a striped raid set (Silicon Image 3112). PS. I did so many changes to the configuraton while trying to get the system to boot, that I am no longer certain what has fixed it for me. YMMV. -- 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