This is a really strange issue I am encountering, whenever I do a normal reboot the system hangs before it even gets to Unraid. What I have discovered is that the USB drive is not seen as bootable by the motherboard. So the fix:

 

• I do is to remove the USB drive
• go to another computer, double click the "makebootable.bat" file which runs fine
• Re-insert the USB device
• Restart the system
• Bam! it sees the USB as bootable and everything functions normally

 

I am posting this for others to find or maybe there is some strangeness with my hardware. I have had this issue regardless of the Unraid version so I am not sure what would cause this behavior. 

 

Basic Info if anyone wants to investigate:

 

Model:	Custom
M/B:	Gigabyte Technology Co., Ltd. Z170X-UD3-CF Version x.x - s/n: Default string
BIOS:	American Megatrends Inc. Version F23g. Dated: 03/09/2018
CPU:	Intel® Core™ i7-6700K CPU @ 4.00GHz
HVM:	Enabled
IOMMU:	Enabled
Cache:	256 KiB, 1 MB, 8 MB
Memory:	24 GiB DDR4 (max. installable capacity 64 GiB)
Network:	bond0: fault-tolerance (active-backup), mtu 1500
Kernel:	Linux 5.19.17-Unraid x86_64
OpenSSL:	1.1.1s

Try with a different flash drive, no key needed, if it doesn't happen transfer the key/config.

demechman worked for me just fine thought id have to do a clean install and re-run another 12 hr parity check many thanks

 

I just used this as well. I was thinking I was in for a very long night and this solved it. 

Thanks demechman for posting this and leaving it up. I ran into this bug today and found your post so helpful!