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Date:      Fri, 11 Jan 2002 15:31:32 -0800
From:      "Kevin Oberman" <oberman@ptavv.es.net>
To:        Tim DeBoer <deboert@cletus.cornhusker.net>
Cc:        questions@FreeBSD.ORG
Subject:   Re: Enabling DMA Access 
Message-ID:  <20020111233132.4BE625D17@ptavv.es.net>
In-Reply-To: Your message of "Thu, 10 Jan 2002 14:28:23 GMT." <Pine.BSF.4.21.0201101422120.70175-100000@cletus.cornhusker.net> 

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> 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This is obsolete.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


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