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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?

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    probably misleading but one thing i heard about recently is FEC
    – alecxs
    Apr 1, 2020 at 11:38
  • I checked it in the kernel sources of both and its turned on(CONFIG_DM_VERITY_FEC=y) in both. Don't know what I am doing wrong. But its worth to know about FEC :) I should disable it as it will not affect the device functionality Right? Apr 1, 2020 at 12:26
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    it is part of dm-verity and can be safely disabled
    – alecxs
    Apr 1, 2020 at 12:49

1 Answer 1

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

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