On my update, the default when asked if I wanted to continue without installing Grub was "No". So I chose it and then the master boot record of the hd. Seems to be working fine for me.
I assume that you would want to update Grub. If you select "NO" it warns that the existing Grub installation may be unable to load new modules. That doesn't sound good. I would like some clarification on the correct way to go about this as well.
so grub would go to /dev/sdi on that system. not the partition /dev/sdi2
usually for a system with one disk install grub to /dev/sda . I've also read that you can install grub to more then one disk, but have not tested doing so.