Really the first issue I've ever had with Unraid. My server updated and rebooted and didn't come back. It's headless so I had to track down a monitor and keyboard to see what was going on. It's not booting from the flash drive any more. It tries to boot from the C drive, fails, tries to boot from the NIC, fails and then restarts. I've pulled the flash drive but not sure best way to proceed to make it bootable again? What might have caused this in the first place?