Difference between revisions of "Zero/install/eMMC erase"

Revision as of 08:13, 6 December 2021

    Radxa Zero >  Installation >  Erase eMMC bootloader

How to erase bootloader from eMMC

This guide describes how to erase bootloader on Radxa Zero's eMMC. Unlike normal PC where they have a well established and documented way of booting, in embedded world it is a bit chaotic and everyone carries their own bootloader and boot sequence. To ensure Radxa Zero can boot with microSD the bootloader on eMMC need to be wiped so it won't interfere with the boot process.

Requirement

• Radxa Zero
• A PC/laptop running Windows, Linux, or macOS
• USB A to C cable or C to C cable, depending on your host

Windows

First, follow maskrom guide to setup and load factory-loader.img:

You can then click Erase button to erase the eMMC.

Linux & macOS

First, follow maskrom guide to setup and load rz-fastboot-loader.bin.

You are now booted into fastboot mode. Check it by running lsusb:

Bus 001 Device 076: ID 18d1:0d02 Google Inc. USB download gadget  Serial: 1234567890

Now execute the following commands to wipe eMMC:

macOS:

fastboot flashing unlock_critical
fastboot flashing unlock
fastboot erase bootloader
fastboot erase bootloader-boot0
fastboot erase bootloader-boot1
fastboot reboot

Linux:

sudo fastboot flashing unlock_critical
sudo fastboot flashing unlock
sudo fastboot erase bootloader
sudo fastboot erase bootloader-boot0
sudo fastboot erase bootloader-boot1
sudo fastboot reboot