Sorry, haven't had a chance yet.  Maybe later today/tonight.

It might be a good thing to compile your own kernel, using the latest
Linux version (v4.4-rc5) and see how that works for you.

John
 

P> have you managed to look at the information in the link below? I think
P> dm-multihost is as module.

P> Regards,
P> Remek

quoted

Here is all the information I collected: http://pastebin.com/VF4Sfrq5


Regarding the testing setup, we can safely consider whole system as a
test, we will rebuild the system once we figure final config anyway.
So we can play around with the current raid with no risk of data loss.