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To: Perttu Laine <plaine@gmail.com>
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From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
Date: 30 Mar 2005 09:41:55 -0500
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cc: freebsd-questions@freebsd.org
Subject: Re: ata driver.
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Don't top-post, please.

Perttu Laine <plaine@gmail.com> writes:

> On Wed, 30 Mar 2005 13:11:24 +0300, Perttu Laine <plaine@gmail.com> wrote:
> > Could there be problem in FreeBSD 5.x (specially in 5.4) ata driver
> > that causes dma timeouts?  mostly those problems in burning dvd-images
> > that I was asking yesterday. because in some puter on same drives and
> > all same hardware I had no problems on windows xp or linux
> > 2.4-kernel... asking this because I had dma timeout problems on
> > freebsd 5.3 puter too. it works fine with pio mode, but when I turn on
> > dma it timeouts all the time.

> Now after more test I found out that I can't even copy large files
> from that drive to another. It hangs on same 3.2GB then too. with dma
> timeout. so it has really nothing to do with dvd-burner drive nor
> atapicam.
> 
> but when I set PIO mode it works fine.

Try enabling DMA for ATA but *not* for ATAPI.