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SubjectRe: 2.4.22-rc2 ext2 filesystem corruption
On 13 Aug 2003 12:28:31 +0100
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:

> On Maw, 2003-08-12 at 22:36, Martin Maney wrote:
> > but that made no difference. I popped a CMD648-based card in, disabled
> > the on-board Promise chip, and it booted right up and works fine with
> > 22-rc2. So if the .id -> .present is the only change that affected the
> > Promise driver (I did some looking for obvious, but gave up after
> > realizing that unless the change actually had a /* borks Promise IDE
> > controllers*/ in it I wouldn't be likely to recognize it), then I guess
> > that's it.
>
> That change simple turns
>
> speed = random()?33:66 (but never > drive allows)
>
> to
> speed = correct value
>
> in the pdc202xx_old driver. There are many things it can trigger but I
> cannot conceive how it can be wrong itself. And not fixing it leaves it
> definitely wrong

Maybe try another controller of same type to verify if it's a general problem
or linked to the specific piece. Could be an awful hw timing bug only showing
up at full DMA speed...

Regards,
Stephan

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