The catalog compatibility just means you don't need to update the catalog when you upgrade the director. That doesn't help with compatibility between the director and storage daemons, which is mainly affected by the communication between them.
In general, you need the versions of the director and storage to be the same. Anything else is untested. I think your simplest option is to build Bacula 9.6.7 yourself on the buster machines so you can upgrade all machines to that version before doing any OS upgrades. __Martin >>>>> On Tue, 22 Apr 2025 19:28:18 +0200, Marco Gaiarin said: > > I need to do a rather complex server upgrade, from debian buster to debian > bookworm (really: from PVE 6 to PVE 8). > > Buster have bacula 9.4.2, bullseye and bookworm have 9.6.7. > > > Looking at bacula 9.6 release notes i catch: > > The catalog datbase format remains unchanged from the 9.4.4 release > > (https://www.bacula.org/bacula-release-9-6-3/) > > > It is possible to have, for a limited amount of time, director and storage > daemons on different 9.4 and 9.6 version, thanks to catalog compatibility? > > > So, can i upgrade director to 9.6, and smoothly upgrade storages to 9.6, one > by one, still using 9.4 storages? > > > Thanks. > > -- > > > > > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users > _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users