Re: Memory Problems - CTCS/memtst

Corin Hartland-Swann (cdhs@commerce.uk.net)
Thu, 2 Aug 2001 17:09:58 +0100 (BST)


Alan,

On Thu, 2 Aug 2001, Alan Cox wrote:
> > The BIOS has an ECC logging feature, and if I understand it correctly,
> > then there /cannot/ have been any main memory errors or they would have
> > shown up in the logs. At least not any single or double-bit errors (ECC
> > corrects single-bit and detects double-bit, doesn't it?)
>
> ALmost certainly it should have been logged. That indicates you may have
> problems elsewhere (pci bus, drivers, motherboard, processors...) or you
> might even be triggering a kernel bug.
>
> Try a 2.2.19 kernel just out of curiousity

Tried stock 2.2.19, and still got the errors on test 2 (only).

I've just tried test 2 on another machine (with good memory) and it looks
like it's a bug in memtst rather than the detection of an error.

D'oh! Back to the drawing board...

I will experiment with file copies to see if I'm still getting memory
corruption under 2.2.19 - if I am (and considering the lack of ECC errors)
then do you think I consider that conclusive proof that there is a problem
with the CPUs or the motherboard?

I have another motherboard of the same type which I can swap out - I will
try that later on...

Thanks,

Corin

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