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SubjectIDE DMA errors [was: Some ext2 errors]
On Sun, Oct 07, 2001 at 03:15:33PM +0200, David G?mez wrote:
> On Sun, 7 Oct 2001, Riley Williams wrote:
> > I see this regularly on one of my systems, and hdparm has never even
> > been insatalled on that system. If I put the drive in a different
> > system, the drive reports clean, but whatever drive I put in here
> > regularly reports that problem.
> Yes, i also have seen this error also when not using hdparm, so it's not
> the cause of this ext2 errors.

Oh, sorry, I blamed before I had facts... my bad.

> >
> > As far as I can tell, it's a problem with the PSU in the computer in
> > question, as I can swap ANYTHING else in there, motherboard included,
> > without the problem going away on that drive, but as soon as I swap
> > the PSU, the problems vanish - even if I put a PSU with a lower rating
> > in its place.
> If i see this error show more times i'll try to replace the PSU. First i
> think is has some relation with my VIA chipset, but if you tell me you
> have changed even your motherboard... ;)

It may not be your MB or drive, but an interaction between them.

I.E. Your bios could've told the linux driver to use a higher dma level than
the drive likes.

Try running "hdparm -d0 /dev/hda" (since your drive is hda in this case...)

And see if the problem goes away. If it does, then try Multimode dma, if
you get errors, try single mode (probably -X31), if you get no errors there,
try UDMA mode 2 (-X66, also make sure you have a 80 line ide cable) and see
if any of the problems come back.

> > > Yeah. If you can't figure out hdparm, leave it alone.
> >
> > Who says hdparm has anything to do with it?
> He says, it seems he has very deep knowledge of hdparm 'secrets'.

Again, sorry for being presumptuous. I've only been able to cause this with
hdparm. Maybe I'm just not using new enough hardware...

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