Re: Adding DMA support for a device

2004-07-08 Thread Joerg Sonnenberger
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 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 l

Re: Adding DMA support for a device

2004-07-08 Thread Martin Nilsson
Avleen Vig wrote: The drive supports DMA, and Windows sets it to use UDMA mode 5 (I think), but BSD does not. Can anyone point me in the right direction for this? have you tried man ata ? The following tunables are settable from the loader: hw.ata.atapi_dma set to 1 for DMA access, 0 for PIO (