Re: btrfs csum failed on git .pack file

Markus Trippelsdorf
2009-09-17T17:10:06Z

On Thu, Sep 17, 2009 at 10:00:28AM -0700, Zach Brown wrote:
>
> > 0130 9FA0: E2 3B 43 AA 63 BF 28 B3 87 B7 FD AB DA 74 2D 1C
> > 0130 9FA0: E2 3B 43 AA 63 BF 28 B3 87 33 FD AB DA 74 2D 1C
>
> B7 = 10110111
> 33 = 00110011
>
> > 06CD DF90: B0 22 6B 46 9F ED 6E 47 73 5E 7E EB DA 5F D6 11
> > 06CD DF90: B0 22 6B 46 9F ED 6E 47 73 1E 7E EB DA 5F D6 11
>
> 5E = 01011110
> 1E = 00011110
>
> > 06CD DFC0: 0D 86 2B B2 57 A4 5A CD 78 4B 08 94 C0 65 17 3A
> > 06CD DFC0: 0D 86 2B B2 57 A4 5A CD 78 0B 08 94 C0 65 17 3A
>
> 4B = 01001011
> 0B = 00001011
>
> And so on.
>
> It looks like a few bits are getting flipped at the same byte offset.
> One can imagine software bugs that would do this, certainly, but upset
> hardware seems awfully likely too.

I'm afraid you're right. I did some further tests and now I'm pretty
sure that a bad RAM module was the root cause of it all...
Oh well.

--
Markus