FusionInsight Manager's scheduled backup functionality is critical for disaster recovery. It is designed to back up all essential configuration and metadata required to restore the cluster's operational state. The backup includes:

1. Manager's own data: This encompasses the O&M server (OMs) configuration files and the DBService database, which stores cluster configurations, monitoring data, and alarms.

2. Security component data: This includes the LDAP database containing user and group information, which is vital for authentication and authorization.

3. Core component metadata: This includes the HDFS NameNode metadata (fsimage and edits logs), which is essential for recovering the HDFS file system.

Therefore, all listed components are part of the regular backup scope. Note: "OMs (orthophosphoric acid case)" contains a typographical error; "OMs" correctly refers to the Operation and Management server.

This section is not applicable as all provided options are correct. Each listed component is a critical part of the data backed up by FusionInsight Manager for cluster recovery.

1. Huawei FusionInsight HD Administrator Guide. In the "Backup and Restore" chapter, under the section "Backup," the documentation specifies the content that is backed up. It explicitly lists Manager data (which includes DBService and OMs configurations), metadata of basic services like HDFS (NameNode), and security component data like LDAP. This confirms that all four options are part of the standard backup procedure. (Reference: FusionInsight HD V100R002C80SPC200 Administrator Guide, Chapter 10: Backup and Restore).

2. Huawei FusionInsight HD Product Documentation. The section on System Reliability and O&M describes the backup and restoration mechanism. It details that to ensure business continuity, the Manager provides a one-click backup of key data, including the Manager's own database, component metadata (HDFS, Yarn, etc.), and security information (LDAP, Kerberos). This comprehensive approach ensures a reliable recovery point for the cluster. (Reference: FusionInsight HD Product Documentation, Section: Reliability > Backup and Restoration).