Hello,
I currently run Unraid on an old HP MicroServer N40L and the 6.11.x releases were working fine on my server. However, attempting to upgrade to 6.12.x appears to break the boot sequence. It doesn't even get to the boot menu, and it feels symptomatic of a misconfigured MBR.
I've experienced this both through upgrading via the GUI and a clean, fresh install using the Unraid USB Creator tool. If I downgrade back to 6.11.x (again using Unraid USB Creator) it boots back up normally as I would expect.
What has actually changed in the 6.12.x in terms of booting up that has fundamentally broken it for older hardware such as mine?