Which ONTAP feature monitors cluster health in MetroCluster environments?

The ONTAP Cluster Health Monitor is a built-in subsystem that actively polls and assesses the status of various hardware and software components within the cluster. In a MetroCluster environment, it is critical for detecting failures of nodes, interconnects, or storage that could impact high availability. Its reports are used to determine the overall health of the configuration and can be a trigger for an automatic unplanned switchover (AUSO) in the event of a site disaster.

B. SnapVault Manager is a legacy tool for managing SnapVault disk-to-disk backup relationships, not for real-time cluster health monitoring.

C. Volume Balancer is a feature that automatically moves volumes between aggregates to balance capacity or performance, not a health monitoring tool.

D. Disk Scheduler is a low-level kernel component responsible for managing I/O operations to physical disks, not a high-level cluster health monitoring feature.

1. NetApp, Inc. (2023). ONTAP concepts for ONTAP 9.12.1. NetApp Documentation. Section: "Health monitoring". This section describes the function of the health monitor in checking cluster components.

2. NetApp, Inc. (2023). System administration for ONTAP 9.12.1. NetApp Documentation. Section: "Monitor cluster health". This section details the commands and purpose of the health monitor subsystem.