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Zero/install/eMMC erase

< Zero‎ | install
    Radxa Zero >  Installation >  Erase eMMC

How to completely erase the Radxa Zero eMMC

This guide describes how to completely erase Radxa Zero eMMC. Since we are running different image, Android or multiple Linux distribution on the Zero, these images uses different bootloader version or boot sequence. It's better to erase the eMMC completely and leave a clean environment before installing new images to eMMC.

Requirement

  • Radxa Zero
  • USB A to C cable
  • A PC/laptop running Windows, Linux/macOS.

Windows

Step 1: Install drivers

Download Zagdig, install it and choose libusb-win32, then click Install Driver.

Zagdig-libusb.png

Download the Android driver from Google:

Click here to download the Google USB Driver ZIP file (ZIP)

Unzip it and right click the .inf file to install the driver.

Install-win-android-driver.png

Step 2: Use RZ USB helper

RZ USB helper is a tool by Radxa for Windows users to manage Radxa Zero booting easier. Download it from Radxa DL.

Press and hold the USB boot button on the Zero, plug in the USB to PC, Maskrom mode should be detected.

Rz-usb-helper-maskrom.png

Select the loader in the RZ_USB_Boot_Helper zip and click Run.

Rz-usb-helper-fastboot.png

Click Erase to erase the eMMC completely.

Rz-usb-helper-erase.png

Linux

For Linux, we use amlogic boot tool to download the bootloader and boot the Zero into the fastboot mode to erase the eMMC.

Step 1: Install pyamlboot tool
   sudo pip3 install pyamlboot
Step 2: Install fastboot

Nexus Tools is an installer for the Android SDK Platform Tools package, which includes ADB, Fastboot, and other applications. We use Nexus Tools to install fastboot. If you already have fastboot installed, you can skip this step.

   bash <(curl -s https://raw.githubusercontent.com/corbindavenport/nexus-tools/master/install.sh)

After it finishes,

   which fastboot

should return you the install location.

Step 3: Boot into fastboot mode

Press and hold the USB boot button on Zero, plug in it to PC, lsusb should see the following:

   Bus 002 Device 030: ID 1b8e:c003 Amlogic, Inc. GX-CHIP

Download the fastboot loader and run it on Zero

   wget https://dl.radxa.com/zero/images/loader/factory-loader.img
   boot-g12.py factory-loader.img

It should output:

Firmware Version :
ROM: 3.2 Stage: 0.0
Need Password: 0 Password OK: 1
Writing rz-fastboot-loader.bin at 0xfffa0000...
[DONE]
Running at 0xfffa0000...
[DONE]
AMLC dataSize=16384, offset=65536, seq=0...
[DONE]
AMLC dataSize=49152, offset=393216, seq=1...
[DONE]
AMLC dataSize=16384, offset=229376, seq=2...
[DONE]
AMLC dataSize=49152, offset=245760, seq=3...
[DONE]
AMLC dataSize=49152, offset=294912, seq=4...
[DONE]
AMLC dataSize=16384, offset=65536, seq=5...
[DONE]
AMLC dataSize=1406320, offset=81920, seq=6...
[DONE]
[BL2 END]

Now lsusb should show the following device:

   Bus 002 Device 016: ID 18d1:0d02 Google Inc. USB download gadget  Serial: 1234567890
Step 4: Wipe the eMMC
   sudo fastboot devices
   1234567890	fastboot
   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

Unplug and plug the power of Zero, lsusb should show the following:

   Bus 002 Device 014: ID 1b8e:c003 Amlogic, Inc. GX-CHIP

the eMMC is wiped and Zero is in maskrom mode now. You can install other OS to eMMC now.

macOS (Apple Silicon/Intel)

For macOS, we use amlogic boot tool to download the bootloader and boot the Zero into the fastboot mode to erase the eMMC.

Step 1: Install pyamlboot tool
   brew install python lsusb
   pip3 install pyamlboot
Step 2: Install fastboot

Nexus Tools is an installer for the Android SDK Platform Tools package, which includes ADB, Fastboot, and other applications. We use Nexus Tools to install fastboot. If you already have fastboot installed, you can skip this step.

   bash <(curl -s https://raw.githubusercontent.com/corbindavenport/nexus-tools/master/install.sh)

After it finishes,

   which fastboot

should return you the install location.

Step 3: Boot into fastboot mode

Press and hold the USB boot button on Zero, plug in it to PC, lsusb should see the following:

   Bus 002 Device 030: ID 1b8e:c003 Amlogic, Inc. GX-CHIP

Download the fastboot loader and run it on Zero

   wget https://dl.radxa.com/zero/images/loader/factory-loader.img
   boot-g12.py factory-loader.img

It should output:

Firmware Version :
ROM: 3.2 Stage: 0.0
Need Password: 0 Password OK: 1
Writing rz-fastboot-loader.bin at 0xfffa0000...
[DONE]
Running at 0xfffa0000...
[DONE]
AMLC dataSize=16384, offset=65536, seq=0...
[DONE]
AMLC dataSize=49152, offset=393216, seq=1...
[DONE]
AMLC dataSize=16384, offset=229376, seq=2...
[DONE]
AMLC dataSize=49152, offset=245760, seq=3...
[DONE]
AMLC dataSize=49152, offset=294912, seq=4...
[DONE]
AMLC dataSize=16384, offset=65536, seq=5...
[DONE]
AMLC dataSize=1406320, offset=81920, seq=6...
[DONE]
[BL2 END]

Now lsusb should show the following device:

   Bus 002 Device 016: ID 18d1:0d02 Google Inc. USB download gadget  Serial: 1234567890
Step 4: Wipe the eMMC
   fastboot devices
   1234567890	fastboot
   fastboot flashing unlock_critical
   fastboot flashing unlock
   fastboot erase bootloader
   fastboot erase bootloader-boot0
   fastboot erase bootloader-boot1
   fastboot reboot

Unplug and plug the power of Zero, lsusb should show the following:

   Bus 002 Device 014: ID 1b8e:c003 Amlogic, Inc. GX-CHIP

the eMMC is wiped and Zero is in maskrom mode now. You can install other OS to eMMC now.