On Thu, Feb 25, 2010 at 09:04:20AM -0500, Bill Pemberton wrote:
> > 
> > I don't suppose you have the dmesg errors from the crash?  This error
> > shows the header in the block is incorrect, so either something was
> > written to the wrong place or not written at all.
> > 
> > Have you memtest86 on this system?
> > 
> > How did it crash...was a power off used to reset the machine?
> > 
> 
> No dmesg.  This has happened on two different machines that both have
> other active btrfs filesystems, so I suspect it's not a memory issue.
> In both cases it was the same data that was being copied when the
> crash occurred.

Ok, is there anything special about this data?

> 
> I didn't deal with the reboot in the first case, so I don't have much
> in the way of details.  In the second case the kernel seemed convinced
> the array was having problems (and the load went way up), but the
> array was convinced it was fine.  A normal reboot hung and the server
> had to be powered off.
> 
> Since it appears that the same operation caused the problem in both
> cases, I'm going to try to reproduce it.  I'll let you know if I can
> reproduce it.

What kind of array is this?  It really sounds like the IO isn't
happening properly.

-chris
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