From owner-freebsd-questions  Sat Jan 12  4:42:55 2002
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Date: Sat, 12 Jan 2002 12:30:23 +0200 (EET)
From: Bernie <Bernie_X@myrealbox.com>
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To: Kevin Oberman <oberman@ptavv.es.net>
Cc: Tim DeBoer <deboert@cletus.cornhusker.net>,
	<questions@FreeBSD.ORG>
Subject: Re: Enabling DMA Access 
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On Fri, 11 Jan 2002, Kevin Oberman wrote:

> > Date: Thu, 10 Jan 2002 14:28:23 +0000 (GMT)
> > From: Tim DeBoer <deboert@cletus.cornhusker.net>
> > Sender: owner-freebsd-questions@FreeBSD.ORG
> >
> > Hi Everyone,
> > I've been playing with DVD on my FBSD box, but it looks lik hell.
> > The standard recomendation is to enable DMA access on ym drives, so I've
> > been digging through various kern files I've found on the web.
> > They all seem to call for
> >
> > options 	ATA_ENABLE_ATAPI_DMA	# Enable DMA on ATAPI devices
> >
> > The problem is, I can't recompile if I add that to my kern.
> > The error message reads unknown option "ATA_ENABLE_ATAPI_DMA"
> >
> > Am I missing a step here? Acutally I know I am, I just don't know what it
> > is.
>
> This is obsolete. The new ata driver now sets this with a sysctl.
>
> Add:
> hw.ata.atapi_dma="1"    # Run the CD-ROM/DVD in DMA mode
> to /boot/loader.conf.
>
> R. Kevin Oberman, Network Engineer
> Energy Sciences Network (ESnet)
> Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
> E-mail: oberman@es.net			Phone: +1 510 486-8634
>

Can the same be done for the an IDE HD? do you know anywhere i can
find more about it?



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