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Date: Thu, 28 May 2015 08:29:52 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: "Pokala, Ravi" <rpokala@panasas.com>
cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>
Subject: Re: Quick question re: dual-booting
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On Thu, 28 May 2015, Pokala, Ravi wrote:

> Hi folks,
>
> For doing some apples-to-apples comparisons on a piece of hardware, we
> want to be able to easily flip back and forth between FreeBSD (10.1,
> amd64, traditional non-UEFI bootstrap w/ GPT) and Linux. To minimize the
> chance of an installer going wrong and nuking something, we're installing
> one drive, installing FreeBSD on it, then swapping in another drive and
> installing Linux on it. Then we'll install both drives, and let the
> bootloader control which one gets booted.
>
> The question is: how do we tell the bootloader which OS to boot? If we can
> do it using loader, great! If we have to use something like grub, that's
> fine too. But either way, I need some guidance.

https://forums.freebsd.org/threads/gpt-multiboot.49055/

Presumably, the Linux entry would be for hd1.