On Jan 28, 2013, at 3:47 PM, Chris Murphy [off-list ref] wrote:

I think regression is going to be needed to find it. Hopefully the problem is restricted to parity computation and data chunks aren't affected; however if a URE occurs in a data chunk, it could be reconstructed incorrectly from bad parity so it's obviously still a big problem.

Actually it also needs to be reproduced as well. Wolfgang, the arrays were created/running under what version of mdadm and kernel the last time you did a check and there were no problems?

And now you're on Fedora 18, but the problem appeared with what version of mdadm and kernel?

Chris Murphy