Re: data corruption with nvidia chipsets and IDE/SATA drives // memory hole mapping related bug?!

[Erik Andersen]

On Sat Dec 02, 2006 at 01:56:06AM +0100, Christoph Anton Mitterer wrote:
> The issue was basically the following:
> I found a severe bug mainly by fortune because it occurs very rarely.
> My test looks like the following: I have about 30GB of testing data on
> my harddisk,... I repeat verifying sha512 sums on these files and check
> if errors occur.
> One test pass verifies the 30GB 50 times,... about one to four
> differences are found in each pass.

Doh!  I have a Tyan S2895 in my system, and I've been pulling my
hair out trying to track down the cause of a similar somewhat
rare failure for the pre-computer sha1 of a block of data to
actually match the calculated sha1.  I'd been hunting in vain the
past few days trying to find a cause -- looking for buffer
overflows, non thread safe code, or similar usual suspects.

It is a relief to see I am not alone!

 -Erik

--
Erik B. Andersen             http://codepoet-consulting.com/
--This message was written using 73% post-consumer electrons--
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