The new FAI version 4.3.1 is now available for jessie in the package repository of fai-project.org.
It includes some bug fixes, of which #769923 is most important. This bugs prevents setup-storage from working, if you use preserve_reinstall in disk_config and set flag_initial=1. This bug was introduced in FAI 4.2.2. The 4.3.1 packages are available for jessie. I will try to prepare a similar package for wheezy. -- regards Thomas