Ofc that's the problem.. When I wrote the mkconf I thought that rw is the default for every branch, but it turns out it's only default for the first one.
ZitatReadable and writable branch. Set as default for the first branch. If the branch filesystem is mounted as readonly, you cannot set it ’rw.’
ZitatReadonly branch and it has no whiteouts on it. Set as
default for all branches except the first one. Aufs never
issue both of write operation and lookup operation for
whiteout to this branch.
@ryecoaaron could you try the latest commit and package it if it works?