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Date: Thu, 23 Jul 2009 15:47:02 -0600
From: Scott Long <scottl@samsco.org>
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To: "M. Warner Losh" <imp@bsdimp.com>
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Cc: svn-src-head@FreeBSD.org, mav@FreeBSD.org, src-committers@FreeBSD.org,
	svn-src-all@FreeBSD.org, cperciva@FreeBSD.org
Subject: Re: svn commit: r195817 - head/usr.sbin/sysinstall
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M. Warner Losh wrote:
> 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...
> 

I already covered this.  Unfortunately, Randi didn't take my bait. 
Anyways, '63' is a minimum, it's not a singular value.  It's also
an incredibly bad default.
Scott