Faster way to copy slot B back to slot A after update

Question

After update into Slot into B, is there any way to mirror the contents of B back to slot A? So that both slots have the same versions.


How do copy complete updated slot B back to slot A efficiently?


— Amruth A | Sources

Answer

I have had to do this while installing Lineage OS on my Moto X4. You can find the "copy partitions" ZIP file on the official installation site here:



Pre-install instructions


In some cases slot b can be unpopulated or contain much older firmware than slot a, leading to various issues including a potential hard-brick. We can ensure none of that will happen by copying the contents of slot a to slot b. This step is NOT optional.


To do this, sideload the copy-partitions-20210323_1922.zip package by doing the following:



  1. Download the copy-partitions-20210323_1922.zip file from here.

  2. Sideload the copy-partitions-20210323_1922.zip package:

    • On the device, select “Advanced”, “ADB Sideload”, then swipe to begin sideload

    • On the host machine, sideload the package using: adb sideload copy-partitions-20210323_1922.zip





— kocj | Sources

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