Re: Hybrid MBR with gpt(8)

[Sad Clouds <cryintothebluesky%gmail.com@localhost>]

On Mon, 16 Sep 2024 16:30:34 +0200
Martin Husemann <martin%duskware.de@localhost> wrote:

> On Mon, Sep 16, 2024 at 03:18:43PM +0100, Sad Clouds wrote:
> > Hello, with Linux I can create hybrid MBR GPT partitions and boot the
> > OS with legacy firmware.
> 
> A hybrid MBR/GPT is not supported (and violates the UEFI standard).
> 
> But you can boot GPT partitioned disks with legacy BIOS firmware, you just
> need to install the proper bootloader (sysinst does that for you if
> you boot via BIOS and partition a disk with GPT).
> 
> You can find the primary bootloader in /usr/mdec/gptmbr.bin and the
> "gpt biosboot" command is used to install it.
> 
> Martin

Hi, I should have been more specific. I'm using Raspberry Pi 3 and
booting 32-bit evbarmv7hf-el. The firmware does not support GPT and
expects legacy MSDOS boot partition. I managed to get it working with
GPT partitions, but first have to use Linux to create Hybrid MBR then
use NetBSD to format UFS partitions and extract the sets. Would have
been nice if all could be done on NetBSD, hence my original question.

Is it likely that "gpt biosboot" can work with evbarm or it is mainly
designed for x86?