Installing 12.04, boot record put on wrong disk

[Steven Pemberton]

I installed 12.04 on a machine where at the time of the install a USB disk (that itself is bootable, though I was installing from a USB stick) was plugged in. Installation went fine, except that the boot/grub bit was put on the external disk rather than the disk I was installing to. As a result, I can only boot now if the external disk is plugged in...

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gksu 2.0.2-6ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu6
Architecture: amd64
Date: Fri Apr 27 11:46:05 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
SourcePackage: gksu
UpgradeStatus: No upgrade log present (probably fresh install)