Enabling automatic backups can help prevent data loss for a MariaDB server. Azure can create and save backups in either locally redundant or geo-redundant storage for greater resiliency. The maximum retention period for MariaDB backup storage is 35 days and they are encrypted by default. For more information, see the Azure documentation.
References:
https://learn.microsoft.com/en-us/azure/mariadb/concepts-backup
In Azure Console -
In Terraform -
References:
https://learn.microsoft.com/en-us/azure/mariadb/howto-restore-server-portal
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/mariadb_server#backup_retention_days