default grub-install not on same disk as root partition

[Redmar]

When installing from mini.iso on usb, some hardware will recognise the install usb as /dev/sda, and name the internal HD /dev/sdb. If you then install the system to /dev/sdb, the default location for grub is still /dev/sda (even though this is not indicated anywhere in the installer). This results in an unusable system after reboot, since grub was installed to the usb-drive. Furthermore, this behaviour is inconsistent with that of the graphical installer (ubiquity), which installs grub on the same disk the system is installed to.

I would therefore like to request a change in the default behaviour of debian-installer to install grub to the same disk as the root partition. This has two advantages:
1) Install is less likely to fail
2) Consistency across all installers for ubuntu.

Another solution would be to at least have the installer indicate where it is going to install grub, so users have some way to know something could be going wrong.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1051239