Install u-boot on NSA320 - how to set fw_env.config (5 replies)

I'm trying to flash the latest U-Boot on my NSA-320. I got to step c and I get a bad block error when I try to execute "fw_printenv > current_envs.txt". In step 8 the "Device offset" was "0x0000", so I changed it to "0xc0000" as directed. When I changed it back to "0x0000" the "fw_printenv > current_envs.txt" command works fine.

I'm afraid to reboot now! What do I do?