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. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1668557 Title: Write performance regression severely affecting hpsa controllers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1668557/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
