What feature of Android provide security to reset the /system changes on reboot?

Question

I am stuck in a weird situation where I have two Android 10 phones from Samsung. I have rooted the stock recovery of both device as instructions given here. The problem is when I change something via recovery like create a new /system/etc/init/custom.rc file then on One device it persist on /system after reboot but on another it doesn't. The changes does persist when I reboot to recovery back.



I want to understand which layer of Android applied this feature:




  • Kernel

  • Stock recovery

  • System

  • or another



Any suggestion? and how to fix it?


— Vatish Sharma | Sources

Answer

Removing avb checks form boot.img/ramdisk/fstab.qcom has fixed the issue.


— Vatish Sharma | Sources

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