How to build initrd without dmraid-driver on Ubuntu 9.10?

"Aha! It occurred to me to simply try removing the dmraid Ubuntu packages to see if it helps, and it seems that it did.

This is what I did (after finding out what the packages are):

sudo apt-get remove dmraid libdmraid1.0.0.rc15

I then updated initrd like this:

sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-2.6.31-17-generic

Now, after reboot, mdmadm doesn't give the ""Device or resource busy"" error message anymore. :-)

NB: I'm not sure if update-initramfs -u was necessary (but it certainly didn't do any harm either)."