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Re: FreeBSD Boot Details

From: Werner Scheinast
Subject: Re: FreeBSD Boot Details
Date: Wed, 20 Jun 2012 22:31:30 +0200 (CEST)
User-agent: Alpine 2.00 (BSF 1167 2008-08-23)

Am Montag schrieb Jordan Uggla:

> The problem is that you don't just have an absence of an embedding
> area, with UFS it's not even clear that you have a reserved *boot
> sector*.
> You can see the mailing list discussion about this here

In this thread they say "UFS file system" when they apparently mean the
whole scheme of disk label and sub-partitions that is normally used in a
*BSD slice. So I'm still not sure about this point ...

> There is a way to tell grub-install "Clobber the first sector of this
> partition even though that might make the entire filesystem unusable,
> or clobber something more subtle but also important" but it seems like
> such a bad idea to do that that I'm reluctant to state how.


> You should either install grub's boot sector to the MBR or nowhere
> (using "grub-install --grub-setup=/bin/true /dev/sda" and loading the
> core.img from another bootloader using multiboot).

With this command the core.img is installed behind the MBR but nothing is
written to the MBR itself, right? That's an interesting variant, good for
many nice tricks. ;-)

Okay, I think I know enough for now,
thanks for the details,


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