Hi,
Thank you for your answer. So I can ignore the messages telling me about the MySQL Version.
Actually I have a problem with SST since Updating to the new xtrabackup version. This might be related, but I wanted to expulse that this is related. Iam taking Backups every hour und instantly testing them every hour. But i feared xtrabackup might create Files that are not readable somewhere for a MySQL 5.5 Server.