Can I downgrade from Bareos back to Bacula?
It is technically not impossible but we haven't tried nor do we intend to write a downgrade script.
Please be sure to have the compatible option enabled in both your storage daemon and all filedaemons if you plan on wanting to be able to downgrade.
Some specific so called datastreams can be read by the bacula storage daemon but a bacula filed will not understand what to do with it so some new features in bareos will not be able to be restored with bacula as its lacking the feature.
Second you had to adapt the database scheme, probably drop some columns. This requires some basic database knowledge. Examing the database upgrade scripts could help to find out what to revert.
Last update on 2013-02-05 by Maik Außendorf.