howto cp to flash

[zzs]

I use cp command, the result is same

cp ./zbarebox.bin /dev/nor0.root

md -s /dev/nor0.root
00000000: ffffffff ffffffff ffffffff ffffffff                ................
00000010: ffffffff ffffffff ffffffff ffffffff                ................
00000020: ffffffff ffffffff ffffffff ffffffff                ................

ls /dev/nor0.* -l
crw-------    4849664 /dev/nor0.root
crw-------    3145728 /dev/nor0.kernel
crw-------     131072 /dev/nor0.bareboxenv
crw-------     262144 /dev/nor0.barebox

My flash write OK in u-boot

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Best Regards,
zzs