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Date:      Fri, 19 Oct 2012 17:41:44 -0400
From:      Gary Palmer <gpalmer@freebsd.org>
To:        Rainer Duffner <rainer@ultra-secure.de>
Cc:        Adrian Chadd <adrian@freebsd.org>, freebsd-stable@freebsd.org, Chuck Burns <break19@gmail.com>
Subject:   Re: 9.1-RC2 - could it be that the installer does not write the MBR?
Message-ID:  <20121019214144.GC40357@in-addr.com>
In-Reply-To: <20121019223841.09866aac@linux-wb36.example.org>
References:  <FDB45151-C7D2-4BAC-B81B-CF4BD14F1633@ultra-secure.de> <CAKFCL4W2Mg_de1NPyxF42=YPqC9BSsiF8bhT5eNrXe_sk_TxaA@mail.gmail.com> <loom.20121018T100200-200@post.gmane.org> <CA%2B7WWSfVkn%2BJ=k0F4NqdfRG_G2NNzkjKf9HZped_KAsr%2Bg-ZxA@mail.gmail.com> <CAKFCL4WiN1AoiMHAOC8m6hZDFvYD8eQgh3NLWxLzPmu%2BoWp8tA@mail.gmail.com> <50802EFC.2010101@gmail.com> <20121018184426.63c59601@suse3> <50803B22.7000706@gmail.com> <CAJ-Vmo=CB%2Buv_KT6_5mWx4FibeVUAbVNaFgbdhtnTxivAZHDpw@mail.gmail.com> <20121019223841.09866aac@linux-wb36.example.org>

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On Fri, Oct 19, 2012 at 10:38:41PM +0200, Rainer Duffner wrote:
> Am Fri, 19 Oct 2012 11:32:49 -0700
> schrieb Adrian Chadd <adrian@freebsd.org>:
> 
> > Guys/girls/etc,
> > 
> > I do suggest that someone actually spends some time coming up with a
> > table of "what the current state is", "what we could do", "what would
> > happen if we did that."
> > 
> > Right now there's a lot of possibilities (new drive, drive with
> > windows, drive with linux, drive with linux/windows, drive with legacy
> > freebsd MBR, etc) and as an outsider trying to figure out what is
> > actually the "right" sounding behaviour, it's difficult for me to sit
> > down and digest all these emails that chip away at a bit of the
> > problem at a time.
> > 
> > So if you'd like to see this fixed, I really do suggest that one of
> > you dumps some time into coming up with a basic table like I said
> > above, work with others who can correct/flesh out the various options
> > to take into account, and then we can come up with a real solution.
> > Then 9.1 can go out the door.
> > 
> 
> 
> If I select the "entire disk" for FreeBSD, I think it's a reasonable
> assumption that the MBR should replaced, too.

I think it should still prompt clearly for permission to splat the boot
record.  There could be an OS (or multiple OSs) on other disks which the
boot loader can reference.  Just because you have complete ownership of
*one* disk is not indicative of being able to take over the entire boot
record.  There are probably too many edge cases here to make a reliable
automated decision, hence the necessity of a question.

> Please don't make people install FreeBSD 9.0 first on disks with
> non-FreeBSD MRRs and then upgrade to 9.1.

Gary



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