Repack Root Filesystem After Export

Environment: Ubuntu 20.04 or later, flashing tool RKDevTool_Release_vx.xx

Ubuntu setup

First install the mkfs.ext4 tool:

sudo apt install e2fsprogs
sudo apt-get install qemu-user-static

1. Extract the update.img image

This is usually the complete firmware .img we provide, which can be flashed directly.

The extracted files are usually under RKDevTool_Release_v2.84\Output\Android\.

2. Copy files to Ubuntu

Copy all files from RKDevTool_Release_v2.84\Output\Android\ to the \updateimg\images\ directory on Ubuntu. Also copy parameter.txt and MiniLoaderAll.bin from RKDevTool_Release_v2.84\Output\.

If prompted to overwrite, select "Overwrite all".

3. Export the RK3588 root filesystem

Pack the root filesystem:

1. cd /
2. sudo tar -czf rootfs.tar.gz --exclude=/proc --exclude=/sys --exclude=/dev/pts --exclude=/run --exclude=/rootfs.tar.gz --exclude=/mnt --exclude=/media /

3. Wait about 5–20 minutes, then copy rootfs.tar.gz to the \updateimg directory on Ubuntu using adb pull or a USB drive.

4. Generate the flashable firmware

Run ./updateimg.

5. New firmware location

The new firmware is under updateimg\images\.