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You can back up MariaDB 5 and restore it to a previous version via Hyper Backup.
To back up MariaDB 5:
Go to Hyper Backup > Create > Data backup task to create a backup task.
Follow the Backup Wizard, and choose MariaDB 5 when you are prompted to select applications to back up.
After the backup task is complete, all the MariaDB 5 databases will be backed up.
To restore MariaDB 5:
Go to Hyper Backup > Restore > Data to restore the desired backup task.
After the restore task is complete, the current settings and data of MariaDB 5 will be overwritten.
MariaDB 5 backed up in DSM 5.0 can be restored either in DSM 5.0 or in DSM5.1 with MariaDB 5 5.5.38-0023.
MariaDB 5 backed up in DSM 5.1 can only be restored in DSM 5.1 with MariaDB 5 5.5.38-0023.
All the MariaDB 5 databases will be mandatorily backed up or restored.
The backup and restore functions will fail if the database name contains \ or `.
For more details, contact your Synology provider or use Synology Support-Center