Bug#901721: debian-installer: grub installed on root drive even if it won't boot that way

[tom <mantrosheiser@yahoo.com>]

Package: debian-installer
Severity: critical
Tags: d-i
Justification: breaks the whole system

I installed '/' on /dev/sdc. The installer defaulted to also install 
grub there. I accepted. The system was not bootable. 

The bios setup for boot device priority choice for 
'hard drive' is limited to simply 'hard drive', which I 
assume is the first hard drive. 

I expected the default would create a bootable system.

I booted the install media and installed grub to /dev/sda.
The system then booted.

Perhaps there is some scenario where it would be desirable 
to put grub on the drive with '/' even if it isn't the first drive,
but that certainly isn't the most common scenario.

I wish the installed would default to install grub to /dev/sda, regardless
of where '/' is.


-- System Information:
Debian Release: 9.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-6-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)