Re: ext3fs errors with kernel 2.6.18 but not with 2.4.27

On 8/3/07, Brad Sawatzky <brad+debian@swatter.net> wrote:
> Hi Francois,
>
> I agree with Doug: CRC errors shouldn't be ignored. At _best_ they are a
> sign that something in your system is marginal. At worst you end up
> reading and/or writing bogus data. The fact that the errors persisted
> after you changed hard drives suggest either a bad cable (most likely), bad
> secondary device on that cable, or bad motherboard (unlikely).

I tried to change the IDE cables (I had a few spares from my father's computer). I happened to notice that I had a 40 pins cable. I replaced it with a 80 pins cable. I have two, I tried both: nothing changed. I still have CRC errors. BTW, there is only one drive on that cable.

However, I noticed that the motherboard's chipset's fan is dead. I knew it was having a hard time spinning lately, but now, it's gone. Would it be the motherboard's chipset that causes those errors because it's too hot?

> > I will try to see tonight or tomorrow if I can manage to get some logs as
> > Douglas suggested. I will also try to look at what driver is in use also.
> > Looking at my config-2.6.18 file:
> >
> > http://www-etud.iro.umontreal.ca/~duranlef/linux-config/config-2.6.18
> >
> > it's hard to guess. All I know is that all SATA support is disabled.
>
> Your config file says that you're using the 'old' (stable) IDE driver, not
> the newer PATA drivers. That's (probably) good.
>
> FWIW, you could try booting with the kernel option 'hda=autotune" or
> "idea=autotune" and see what happens. That should allow the driver/chipset
> to fall back to a slower PIO mode if it sees CRC errors. (Though I don't
> know what, if anything, it will do if DMA is enabled...)

Well, once in a while, the kernel resets ide0, and then DMA is dropped (and I force it back on afterwards), which I guess is not a good idea.

-- 
Francois


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