[manjaro-dev] Android like Factory Reset (Idea)

Jonathon Fernyhough jonathon at manjaro.org
Fri Feb 12 18:36:08 CET 2016

On 12/02/16 16:26, .. wrote:
> I get it. Out of curiosity I want to add something though.
> So, my phone came preinstalled with 4.4.2. kitkat,
> since than it got a couple of small updates, still on kitkat but the build number changed.
> Then, I did a factory reset, but the build number didn't go back. So, what I think is
> It might have a way to keep the installation medium on the local disk updated
> with the system as well.  Would it be incorrect to think that way?

The Android file system is not the same as a standard Linux OS and
consists of a number of parts, generally:


Boot and System are almost exclusively read-only. Users' data and
applications (including updates to system applications) are stored in a
separate partition (Data).

When you perform a "factory reset" Android wipes Data, Cache, and
Dalvik-Cache, leaving the phone in a "clean" original state. When you
update your Android version, it flashes a new image to the Boot and
System partitions (and also clears Cache and Dalvik-Cache).

Think of it being similar to an Ubuntu Live USB with persistence;
clearing the Casper partition will revert the Live USB back to "stock".


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