Comment 23 for bug 1668557

I think I found the change in linux stable: http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=20d74bf29cfae86649bf1ec75038c79a9bc5010f

It is correct to "fix" it, the maximum size is bigger.

Yet in your case with the drives very likely not having 4k formatting and the strip-size/offset being different it appears as an anti-tuning which you need to overcome now.

Let me know how the results with setting 512 (and maybe also rotational=0) in a bad kernel work for you.