Comment 6 for bug 392510

Luke and danwood76, it seems like you haven't read the original bug report correctly. He does not want to use dmraid in Linux, only his Windows partition uses dmraid. His problem is that dmraid is unconditionally installed when a fakeraid is detected on his disks.

And clearly it must be a bug that the initrd is not rebuilt after purging dmraid.

I can inform you that the live CD boots up with dmraid loaded. If there are no fakeraids involved, the dmraid package will be deleted from the installation target system by ubiquity.