This is know to affect the Ubuntu Server Daily Build of Ubuntu 12.04,
as of March 12, 2012.
The kernel modules for 'dm-mirror' and 'dm-raid' are missing, which
prevent the installer's dmraid setup from starting for NVidia and
Silicon Image ATA fakeraid controllers.
Compounding this issue, for up
Thank you for taking the time to report this bug and helping to make
Ubuntu better. Unfortunately, we cannot work on this bug because your
description didn't include enough information. You may find it helpful
to read "How to report bugs effectively"
http://www.chiark.greenend.org.uk/~sgtatham/bugs
