Hello 
Short Story: I want to know how to PXE boot to a USB device. And my USB device isn’t being found.
Why would I want to do this?
I have several racks that I am using to do some functional testing on storage controllers.
Currently, I use a bootable USB connected to each server to change the firmware / do benchmark testing on the storage controller.
There are other, less primitive ways of doing this, just go with me please. 
Problem
I have gotten as far as editing the partition files in Foreman and specifying “ignoredisks --only-use=sdb”, “part / --ftype xfs --size 10000”, etc. This should only be partitioning disk sdb (the USB drive).
Using RHEL8/CentOS8/Fedora34, the problem is that the flash drive device have not loaded when anaconda starts the kick-start installation and thus the path is not recognized.
I know that there are some Linux guys in this community, and I was wondering if you could help me out. Or point me in the right direction.