Hello,

after some additional experiments we found an acceptable solution for our problem.

1. I saved the current configuration on the older server.
2. Delete ALL snapshots in volume manager on old server.
3. Export settings file of current configuration from old server.
4. Load factory default configuration on new server.
5. Reboot new server.
6. Upload exported settings file from old server into new server.
7. Reboot new server.
8. Recreate snapshots on old server.
9. Create snapshots on new server.

Now it works as expected on the new server.

Regards

Robert