Ubuntu Core: how the file-system works

[Luca Dionisi]

Hi all,

I am planning to build a raspberry-based gadget and I would rather use
Ubuntu Core on it. So I am right now using it on a KVM in order to see
how it works.

First of all I need to understand how the file-system works. Because I
need to edit some system files.

My first question to the list is: why don't I see two partitions on
the disk? I recall having read that Ubuntu Core was able to rollback to
the previous version of "core" snap thanks to a second partition.
Do I miss something?

--Luca