Tried to install ubuntu 11.10 alongside with Win7 on a asus p5n32-e sli with nvidia raid on-board.

Have tried different types of raid configs and also installing with the default "install with window7"

First times the installer went through, but only used 1 part of the mirrored RAID1 (although gparted in the installer detected the RAID1 as 1 disk ( /dev/mapper/ nvidiablablabla )
Reboot: Grub did not display the windows installation anymore, since Win7 was installed on both HDs mirrorde as it was a mirror.

then, when making boot-repair from yanubuntu, this seemed to install grub in the /dev/mapper/ nvidiablabla MBR, but then the startup failed from grub with: invalid environment block

So I reconfigured the RAID set to a raid0, cleared the disks with the raid manager, installed windows again.
Started the installation with the ubuntu 11.10 cd again and.... grub failed to install on /dev/mapper/ nvidiaxxxxx

This happens with manual installation, with the guided install.

Also tried to install grub on a different partition, not on the /dev/mapper/ nvidiaxxxxx disk directly, but no success.