not able to install ubuntu on my computer

[Benoit Plante]

I tried to install ubuntu on my computer along windows, and it was not able to install grub. I think it is because I have a RAID drive.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubiquity 2.14.6
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
CasperVersion: 1.331
Date: Sat May 18 15:53:24 2013
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=fr_CA.UTF-8
 TERM=linux
 PATH=(custom, no user)
 LANG=fr_CA.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)