ATAng no PIO fallback?
Soren Schmidt
sos at spider.deepcore.dk
Thu Aug 28 07:48:01 PDT 2003
It seems Anish Mistry wrote:
> > > > it DMA was fixed for my CD/DVD combo drive. I changed the
> > > > hw.ata.atapi_dma="0"
> > > > to hw.ata.atapi_dma="1" in my /boot/loader.conf. After a reboot I tried
> > There is no PIO fallback in ATAng (so far), if you know that your ATAPI
> > device doesn't do DMA why on earth do you enable it ?
> >
> Because the drive does support DMA. I've tested to see it DMA actually works
> in windows, PIO vs DMA while playing a DVD, and there is a big difference,
> and I can only assume that it works.
Hmm, I didn't hear the "works in windows" bit :)
Could you mail me a dmesg from the system, that might uncover some usefull
info on if/how/why DMA can work on your HW..
-Søren
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