Need help with creating boot USB

[endnot]

I cannot create a usable USB boot image. I am working on an Ubuntu machine.
I have tried 2 different USB devices.
I have used both dd and Etcher.
To verify the USBs are good, I was able to create a bootable USB image using different ISO image (not FreeNAS) on both USB drives after the FreeNAS attempt.

I have verified the ISO using 256 hash.

I seem to have a good ISO and USB devices. I am not sure if there is something associated with BSD that I am missing. Would much appreciate help solving this, I thought this was the easy step.....

TIA

dd seems to return correctly:

sudo dd if=FreeNAS-11.2-U2.iso of=/dev/sdb bs=64k
9159+1 records in
9159+1 records out
600274944 bytes (600 MB, 572 MiB) copied, 86.5832 s, 6.9 MB/s

The results of fdisk -l shown below. I tried using fdisk to repair the PMBR mismatch but did not help.

GPT PMBR size mismatch (1172411 != 15663103) will be corrected by w(rite).
The backup GPT table is corrupt, but the primary appears OK, so that will be used.
Disk /dev/sdb: 7.5 GiB, 8019509248 bytes, 15663104 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier:

Device Start End Sectors Size Type
/dev/sdb1 80 1679 1600 800K EFI System
/dev/sdb2 3 31 29 14.5K FreeBSD boot

Partition table entries are not in disk order.

 

[Chris Moore]

There have been a lot of people having trouble with the most recent ISO files. You might want to open a ticket on the bug tracking site.

https://redmine.ixsystems.com/projects/freenas/

The developers don't come here as often as you might think.

 

[ThreeDee]

I went "old school" and burned the iso to a blank DVD I had laying around . When I tried to get the ISO onto an USB, I got it to install onto another USB drive, but there was some gpart error on boot up (or something like that.. I forget now) but FreeNAS still loaded and seem to run fine. Installing off of the ISO burned to a blank DVD .. no errors on boot installing to either USB drive or SSD