[EMAIL PROTECTED] (Russ Allbery)  wrote on 22.05.06 in <[EMAIL PROTECTED]>:

> Bruce Korb <[EMAIL PROTECTED]> writes:
>
> > I do that also, but I am also careful to prune repository
> > directories (CVS, .svn or SCCS even).  I rather doubt it is my RAM,
> > BTW.  Perhaps a disk sector, but I'll never know now.  (Were it RAM,
> > the failure would be random and not just the one file.)  The original
> > data were rm-ed and replaced with a new pull of the Ada code.
>
> Yup, I've seen change of capitalization of a single letter in files due to
> bad disk sectors before, even on relatively modern hardware.  It's a
> single bit error, so it's an explainable failure mode.

And there's enough involved so that a disgnosis is almost impossible until  
you get a lot more errors.

Memory. Disk. Controller. Cpu ...

... or it could just be a lone alpha particle hitting the bit in one of  
those places.

Could also be a software error. A stray pointer in the kernel, being used  
to set a flag, and happening to point into a buffer for that disk block.

Until it gets reproducible - or reproduces itself ... no way to tell.

MfG Kai

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