Posted by user8446 on Mar 29, 2016; 6:59pm
URL: https://itus.accessinnov.com/Factory-reset-not-truly-a-full-reset-tp562p563.html

Are these commands important?

if [[ `df | grep -c overlay` == "1" ]]; then
        umount /overlay
fi
sleep 1
umount /overlay

They run first in the factory reset script and you didn't list them.