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SubjectRe: IDE corruption, 2.2, VIA chipset in PIO mode
Alan Cox wrote:
>
> > Used for a while, copied about 7gigs onto it. Then got lots of BadCRC
> > errors when reading from disk (from dma_intr). Decided to disable DMA
> > as a result of this...
>
> Cable errors. Disabling DMA also disabled error checking and correction

Jeez. Crappity, crappity, crap. Embarrassing mistake of the year.

I managed to convince myself that the cable couldn't possibly be
responsible, because we got corruption even when using UDMA-33 (which
protects from cable faults). Somewhere in my logic I obviously lost the
plot, and forgot that I switched DMA off *before* seeing corruption.

Sigh. Ah, I think I see a nice brown bag, in a nice deep hole.

Thank you for gently pointing out the error of my ways ;-)

Neil
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