Zero/install/eMMC erase
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