On Tue, Sep 19, 2023 at 2:41 PM John Jason Jordan <[email protected]> wrote: > > I'm back in Ubuntu, following my ninth failed attempt to install Debian > 12. But I should say at the beginning that, like Rich, I've used ext4 > for many years and have never had a problem. My issues with installing > Debian 12 is that it won't boot because of a failure in setting up Grub. > And the root cause of that is because I am too dumb to properly follow > the instructions in the Debian installer. Xubuntu is on a Samsung > M.2 drive of 1TB, and I'm trying to install Debian on a new > Samsung M.2 drive of 2TB. I can easily tell which is which when they > give me the Samsung product name, but while setting up Grub it asks > 'Install grub to your primary drive?' Well, which drive is that? Both > drives have a primary partition for / and a second logical partition > for /home.
Your computer will find grub on *one* of the devices and use the configuration it finds there to show you a menu and then pick which OS to boot, which might be on different devices. Your machine's BIOS will tell it which device the machine looks for grub on. If it can't find grub on the first device, it might fall through to other devices (the priority is configured in your BIOS), but once it finds the bootloader (grub), it doesn't fall any further.
