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SubjectRe: ide-cd vs. DMA
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On Mon, 2005-05-23 at 23:59 -0400, Karim Yaghmour wrote:
> Benjamin Herrenschmidt wrote:
> > Well, not sure what's wrong here, but ATAPI errors shouldn't normally
> > result in stopping DMA. We may want to just blacklist your drive rather
> > than having this stupid fallback. In this case, I suspect it's
> > CSS/region issue with a DVD.
>
> Here's a little bit more info:
>
> Here's from dmesg:
> hdc: SAMSUNG SC-140B, ATAPI CD/DVD-ROM drive
> hdc: ATAPI 40X CD-ROM drive, 128kB Cache, UDMA(33)

.../...

That's a lot of problems ... I would blame HW here, either a bad cable,
bad master/slave jumpers or a bad drive in the chain... or maybe as you
suggested, a problem with the controller.

Ben.


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