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Date: Mon, 23 May 2011 23:09:15 +0200
From: Wilko Bulte <wkb@xs4all.nl>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
Message-ID: <20110523210915.GA3024@freebie.xs4all.nl>
References: <4DD9F0A3.701@FreeBSD.org> <11294.1306133790@critter.freebsd.dk>
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Cc: Adrian Chadd <adrian@FreeBSD.org>, src-committers@FreeBSD.org,
	svn-src-all@FreeBSD.org, Marcel Moolenaar <marcel@xcllnt.net>,
	"Andrey V. Elsukov" <ae@FreeBSD.org>,
	Stefan Farfeleder <stefanf@FreeBSD.org>,
	svn-src-head@FreeBSD.org, Warner Losh <imp@bsdimp.com>
Subject: Re: svn commit: r221972 - head/sys/geom/part
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Quoting Poul-Henning Kamp, who wrote on Mon, May 23, 2011 at 06:56:30AM +0000 ..
> In message <4DD9F0A3.701@FreeBSD.org>, "Andrey V. Elsukov" writes:
> 
> >There is another opinion:
> >http://www.boot-us.com/gloss02.htm
> >
> >"There is the convention that partitions should always start and end on *=
> >cylinder boundaries*."
> 
> It is actually more weird than that:
> 
> The rule is that the starting or ending head of one of the four
> slices represent the number of heads used to access the drive, and
> ditto for sectors.
> 
> This "requirement" dates back to "smart" BIOS'es and ST-506 drives
> which couldn't ask the drive for its geometry.

WD1003 anyone?

Wilko