md raid general discussion

Hi All,

As you know, Coly has proposed a general md raid discussion. I would like to attend this discussion, and besides the topics listed in previous proposal, I think we can talk about improve the test suite of mdadm to make it more robust (I can share related test suite which is used for clustered raid).

Also I could share the status of clustered raid about what we have done and what we can do in the future.

Finally, I'd want to know/discuss about the roadmap of RAID.

Thanks a lot!
Guoqing