Re: Kernel panic, FS corruption Was: Re: Call for RAID-6 users

["H. Peter Anvin" <hpa@zytor.com>]

Jim Paris wrote:
> 
> No, I did see the same corruption with XFS; it just took more work
> before it would show up (ie. I couldn't get it to show up by simply
> copying one huge file; I had to untar a full filesystem onto it).
> So I would suspect the odd access patterns.  I could also run a test
> with EXT2/3 if you'd like.  I didn't manage to trigger the corruption
> directly on the md device, but my access pattern was quite simple in
> that case (dd big blocks to different areas).
> 

If you can reproduce it with ext2/3 it would make debugging simpler, because I 
understand the ext code and data structures a lot better.

Thanks for that data element; it pretty much confirms my suspicions.

 >
> Are you able to reproduce the problem with the scripts I sent earlier?
> If not, I can give you access to a machine that can.
> 

I hate to admit it, but I haven't had a chance to try yet.

	-hpa