Installing Ubuntu 14.04.3on multi hard drive system

[Colin Law]

On 21 September 2015 at 22:55, Jim Byrnes <jf_byrnes at comcast.net> wrote:
> I just added a 3d hard drive to my system so I can slowly migrate to
> 14.04.3. sda = ubuntu 12.04, sdb = windows 7 and sdc is the new hard drive
> verified with gpartd.
>
> When I boot from the live cd and choose to install ubuntu sdc is not an
> option so I choose "something else".  The next screen shows me sdc so I
> choose it.  sda is shown as the choice of where to put the boot loader.
>
> I want to install 14.04 on sdc and keep booting to 12.04 by default until I
> get 14.04 setup to my liking.  So is choosing sdc and leaving the boot
> loader installation on sda the correct choice?  It's been awhile since I
> have done this and don't want to mess up my system.

After installing I believe the new system will become the default.  To
make the original the default boot into it (by selecting from the grub
boot screen) and in a terminal run
sudo grub-install
sudo update-grub

You may have to repeat this occasionally following updates to 14.04 if
the update reconfigures grub.

Colin