Hello, This page contains instructions on how to restore a backup: https://mariadb.com/kb/en/library/full-backup-and-restore-with-mariabackup/#... 1. stop MariaDB: # systemctl stop mariadb.service 2. datadir must be empty: # rm -rf /var/lib/mysql/ 3. run mariabackup: #mariabackup --copy-back --target-dir=/var/mariadb/backup/ 4. fix permissions: # chown -R mysql:mysql /var/lib/mysql/ 5. start MariaDB: # systemctl start mariadb.service mariabackup said "completed OK!" and I see that datadir contains the restored data. However, when following these instructions, I can't start MariaDB anymore. I have the following error: mar 29 07:06:49 myhostname mysqld[11359]: 2019-03-29 7:06:49 0 [ERROR] Plugin 'InnoDB' init function returned error. mar 29 07:06:49 myhostname mysqld[11359]: 2019-03-29 7:06:49 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. mar 29 07:06:49 myhostname mysqld[11359]: 2019-03-29 7:06:49 0 [Note] Plugin 'FEEDBACK' is disabled. mar 29 07:06:49 myhostname mysqld[11359]: 2019-03-29 7:06:49 0 [ERROR] Could not open mysql.plugin table. Some plugins may be not loaded mar 29 07:06:49 myhostname mysqld[11359]: 2019-03-29 7:06:49 0 [ERROR] Unknown/unsupported storage engine: InnoDB mar 29 07:06:49 myhostname mysqld[11359]: 2019-03-29 7:06:49 0 [ERROR] Aborting mar 29 07:06:49 myhostname systemd[1]: mariadb.service: main process exited, code=exited, status=1/FAILURE mar 29 07:06:49 myhostname systemd[1]: Failed to start MariaDB 10.3.13 database server. mar 29 07:06:49 myhostname systemd[1]: Unit mariadb.service entered failed state. mar 29 07:06:49 myhostname systemd[1]: mariadb.service failed. Is there something missing in the documentation? Thomas