I don't think there's currently easy way to avoid patching the kernel to get dmraid45. I'm using a custom "non-official" 2.6.22 kernel with gutsy, but a 2.6.22 kernel most likely works fine also with feisty.
I don't think there's currently easy way to avoid patching the kernel to get dmraid45. I'm using a custom "non-official" 2.6.22 kernel with gutsy, but a 2.6.22 kernel most likely works fine also with feisty.