The flash_nuke.uf2 linked at https://github.com/BlueSCSI/BlueSCSI-v2/wiki/Updating-Firmware does not work with the BlueSCSI Ultra I needed to use the one from https://datasheets.raspberrypi.com/soft/flash_nuke.uf2
The flash_nuke.uf2 linked at https://github.com/BlueSCSI/BlueSCSI-v2/wiki/Updating-Firmware does not work with the BlueSCSI Ultra
I needed to use the one from https://datasheets.raspberrypi.com/soft/flash_nuke.uf2