I've completely rebuild my unRaid server with a new motherboard, CPU, RAM, & SSDs.  The only thing I've retained are my nine hard drives.

The hardware assemble is complete and I can boot into the bios of the motherboard.  In the boot options it shows the unRaid USB drive but when I try to boot it just loops back to BIOS set up.  Before that happends, I can see the light on the USB drive come on so there is some activity.  I've tried the drive in multiple USB ports on the motherboard.

So, my question is - do I have to rebuild my boot drive for this new configuration?  

Here's a few of the details:

1) the old motherboard was from an Dell Optiplex 790 (circa 1993)

2) the USB drive is a 4gb Sandisk formated as FAT32

3) the new motherboard is an AsRock z690 Extreme

I've looked through the bios of the new motherboard to see if I have to enable some sort of legacy boot option but a) I can't find any, and b) it appears that it is seeing the SanDisk boot drive.

I've completely hit the wall here.  Although part of that is because it's probably been over a decade since I build this boot drive and I'm scare to touch what had previously been working.

Thanks in advance to the heroes of this community.  I know someone will save my bacon (be that pork or vegan based). 

Have you tried booting UEFI? 

 

Folder on flash should be named EFI to boot UEFI

Or named EFI- to boot legacy

 

After posting this I found the hack about rename one folder.  Changed it from "EFI-" to "EFI" and my system came to life.

Thanks.