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Date: Thu, 23 Jul 2009 13:23:50 -0400 (EDT)
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To: mav@FreeBSD.org
From: "M. Warner Losh" <imp@bsdimp.com>
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Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org,
	src-committers@FreeBSD.org, cperciva@FreeBSD.org
Subject: Re: svn commit: r195817 - head/usr.sbin/sysinstall
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In message: <4A66D0F4.4030108@FreeBSD.org>
            Alexander Motin <mav@FreeBSD.org> writes:
: Colin Percival wrote:
: > Author: cperciva
: > Date: Wed Jul 22 03:50:54 2009
: > New Revision: 195817
: > URL: http://svn.freebsd.org/changeset/base/195817
: > 
: > Log:
: >   Remove the "dedicated disk mode" partitioning option from sysinstall, in
: >   both the disk partitioning screen (the 'F' key) and via install.cfg (the
: >   VAR_DEDICATED_DISK option).  This functionality is currently broken in 8.x
: >   due to libdisk and geom generating different partition names; this commit
: >   merely acts to help steer users away from the breakage.
: >   
: >   Submitted by:	randi
: >   Approved by:	re (kensmith)
: > 
: > Modified:
: >   head/usr.sbin/sysinstall/disks.c
: 
: Is there any other way to not align FS block to the ugly legacy 63
: sectors per track boundary with sysinstall now? I think RAIDs won't be
: happy. May be it would be better to fix it?

The reason we do it like this is because the boot blocks occupy the
first cylinder group.  Which with today's fake goemetry is 63
blocks...

Warner