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Date: Sun, 9 Aug 2009 15:47:24 +0200
From: Ed Schouten <ed@80386.nl>
To: Takahashi Yoshihiro <nyan@jp.FreeBSD.org>
Message-ID: <20090809134724.GX1292@hoeg.nl>
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Cc: mav@freebsd.org, freebsd-hardware@freebsd.org, freebsd-arch@freebsd.org
Subject: Re: Do we still need ATA disk CHS addressing?
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* Takahashi Yoshihiro <nyan@jp.FreeBSD.org> wrote:
> In article <4A7DF076.4070203@FreeBSD.org>
> Alexander Motin <mav@freebsd.org> writes:
>=20
> > While preparing wrapping ATA(4) low-level drivers code into CAM SIM, I
> > would like to remove CHS addressing support to make code cleaner. CHS
> > addressing is officially declared obsoleted and replaced by LBA. Since
> > ATA/ATAPI-6 specification (October 2001) it is even no longer
> > documented.
> >=20
> > Have anybody seen ATA drive without LBA support in last years?
> > Any other objections against removing it?
>=20
> PC98 uses CHS addressing because the internal interface works for very
> old HDD only, so I hope it remains if possible.  But if you need a lot
> of works for CHS support, I agree to remove it.

Wouldn't it be possible to keep the old ATA code in the tree for users
who want to use stuff like this?

--=20
 Ed Schouten <ed@80386.nl>
 WWW: http://80386.nl/

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