> I will > investigate further... It turns out that usb boot is more complicated than it needs to be. With readparts= the partitions are set up automatically, but then they are thrown away again, I think because partfs is being started more than once. I will leave it to the original authors to look at, but a workaround is to use sdB0part as Erik suggested. I find this cmdline.txt works for me:
sdB0part='fossil 204864 1804192' bootargs=local!/dev/sdXX/fossil ipconfig= where the sdB0part numbers are found from 'grep fossil /dev/sdXX/ctl'
