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To: Julian Elischer <julian@elischer.org>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Sat, 02 Jan 2010 14:28:50 PST."
	<4B3FC8A2.1090901@elischer.org> 
Date: Sat, 02 Jan 2010 22:37:21 +0000
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Cc: Miroslav Lachman <000.fbsd@quip.cz>, Thomas Backman <serenity@exscape.org>,
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	Pieter de Goeje <pieter@degoeje.nl>, Alexander Motin <mav@freebsd.org>
Subject: Re: File system blocks alignment 
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In message <4B3FC8A2.1090901@elischer.org>, Julian Elischer writes:
>Poul-Henning Kamp wrote:
>> You overlook that MBR/Fdisk requires bootable slices to start at a
>> "track".  That means that the propper slice-alignmen typically
>> will be 8*63=504 sectors.
>
>No it doesn't, (or at least it didn't) but it has become custom to do so.

Yes it does, for all slices not starting on the first head.

We've been over this maddness in the past multiple times.

If somebody is willing to suffer this breakage on funky old bios'es,
betting that most of those systems will never run FreeBSD-9, I would
say they are being emminently sensible, but still have their work
cut out for them.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.