( micsa | 2020. 03. 24., k - 09:00 )

cat /dev/zero | tr '\0' $'\x55' | dd of=/dev/sdc status=progress
cat /dev/zero | tr '\0' $'\xAA' | dd of=/dev/sdc status=progress

cat /dev/zero | tr '\0' $'\xff' | dd of=/dev/sdc status=progress