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Date:      Sun, 17 Nov 2013 14:59:05 -0700 (MST)
From:      Warren Block <>
To:        Polytropon <>
Cc:        saeedeh motlagh <>, freebsd-questions <>
Subject:   Re: how install two freebsd9.2 on one disk?
Message-ID:  <>
In-Reply-To: <>
References:  <> <> <> <> <> <>

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On Sun, 17 Nov 2013, Polytropon wrote:

> On Sun, 17 Nov 2013 09:09:23 -0700 (MST), Warren Block wrote:
>> On Sun, 17 Nov 2013, Polytropon wrote:
>>> On Sun, 17 Nov 2013 16:51:42 +0330, saeedeh motlagh wrote:
>>>> (although i do it and nothing change) if not, where is boot manager and how
>>>> should i use it? i think something should be done about boot partition
>>>> (ada0p1), don't it? please help me to boot my 2 OS correctly.
>> This is a good question.  As far as I know, boot0 will only work on real
>> MBR disks, and does not understand GPT partitions.  Any time I've needed
>> to multiboot, the other operating system can't handle GPT anyway, so MBR
>> is required.
> It's just the question in how far gpart can be used to create
> such an MBR layout, or if traditional tools (fdisk, bsdlabel,
> newfs) will be easier here?

I was talking about the MBR partitioning scheme versus GPT.  gpart can 
create both, and of course newfs must be used regardless.  The concern 
is whether boot0 can recognize GPT partitions.  Probably not, but I have 
not tried it.

>> Another option for GPT is to use the bootme and bootonce flags.  See
>> gptboot(8).
> Those are also mentioned in "man gpart", which I was already
> thinking of (in terms of being a part of the solution).

Some of the description of them in gpart was moved to the new gptboot 
man page.  It was more relevant there, and is explained in more detail.

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