Faster way to copy slot B back to slot A after update 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?
I have had to do this while installing Lineage OS on my Moto X4. You can find the &quot;copy partitions&quot; 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:

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