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To: ache@nagual.pp.ru
From: "M. Warner Losh" <imp@bsdimp.com>
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cc: current@freebsd.org
Subject: Re: Can't change partition table anymore
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In message: <20050404041419.GA49627@nagual.pp.ru>
            Andrey Chernov <ache@nagual.pp.ru> writes:
: On Mon, Apr 04, 2005 at 01:11:01PM +0930, Daniel O'Connor wrote:
: > > I was trying this variant:
: > > boot0cfg -s 2 /dev/ad0
: > 
: > Strange that works OK for me.
: 
: When I finally install bootloader now with kern.geom.debugflags=16 trick, 
: it works OK for me too. But not before when there was some MBR written by 
: Windows.
: 
: So, never use Windows, it is dangerous, use our protection instead. It 
: prevents any changes. No changes - no mistakes.
: 
: (perhaps just permanently unplug keyboard to feel even more safe?)
: 
: Seriously, any sysadmin who try to install FreeBSD for the first time and 
: see he can't edit partition, just throw out the CD and install Linux 
: instead which allows anything for root in that area.

I don't see these problems on my disks.  Maybe your partitions
overloap the MBR?

Warner