From owner-freebsd-hackers@FreeBSD.ORG  Thu Jul  8 13:41:47 2004
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Date: Thu, 8 Jul 2004 15:41:35 +0200
From: Joerg Sonnenberger <joerg@britannica.bec.de>
To: freebsd-hackers@freebsd.org
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Subject: Re: Adding DMA support for a device
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On Thu, Jul 08, 2004 at 01:17:26AM -0700, Avleen Vig wrote:
> I have a DVD drive which is recognised by FreeBSD:
>   acd0: DVD-R <DVD-RW IDE1004> at ata1-slave PIO4
> 
> Can anyone point me in the right direction for this?

hw.ata.atapi_dma=1 in /boot/loader.conf. DMA for ATAPI is not active
by default because a lot of chipsets are buggy.

Joerg