Adding DMA support for a device

Joerg Sonnenberger joerg at
Thu Jul 8 06:41:47 PDT 2004

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.


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