➜ sudo hexdump -C -n 1024 /sys/bus/thunderbolt/devices/0-3/nvm_active1/nvmem
hexdump: /sys/bus/thunderbolt/devices/0-3/nvm_active1/nvmem: Input/output error
➜ sudo hexdump -C -n 1024 /sys/bus/ thunderbolt/ devices/ 0-3/nvm_ active1/ nvmem
hexdump: /sys/bus/ thunderbolt/ devices/ 0-3/nvm_ active1/ nvmem: Input/output error