Debian Mirror / Another fix for hashsum mismatch

At work I am running a debian mirror for a bunch of client machines. I needed packages from the backports, so I added the backports to mirror and got this nice error:

W: Failed to fetch ftp://$SERVER_AT_WORK/debian-backports/dists/jessie-backports/main/binary-amd64/Packages Hash Sum mismatch

Turns out, the old mirror structure from debian wheezy cannot be used for a jessie-mirror, you need to use the same directory structure as on the offical mirrors (ftp://$SERVER_AT_WORK/debian/dists/jessie-backports).

For a complete mirror you can use this script: