You can check the health of the vSAN cluster.

You can use the vSAN health checks to monitor the status of cluster components, diagnose issues, and troubleshoot problems. The health checks cover hardware compatibility, network configuration and operation, advanced vSAN configuration options, storage device health, and virtual machine objects.

The vSAN health checks are divided into categories. Each category contains individual health checks.

Table 1. vSAN Health Check Categories

Health Check Category


Hardware Compatibility

Monitor the cluster components to ensure that they are using supported hardware, software, and drivers.

Performance Service

Monitor the health of a vSAN performance service.


Monitor vSAN network health.

Physical disk

Monitor the health of physical devices in the vSAN cluster.


Monitor vSAN data health.


Monitor vSAN cluster health.


Monitor vSAN cluster limits.

Online health

Monitor vSAN cluster health and send to VMware’s analytics backend system for advanced analysis. You must participate in the Customer Experience Improvement Program to use online health checks.

vSAN iSCSI target service

Monitor the iSCSI target service, including the network configuration and runtime status.


Monitor vSAN encryption health.

Stretched cluster

Monitor the health of a stretched cluster, if applicable.

vSAN periodically retests each health check and updates the results. To run the health checks and update the results immediately, click the Retest button.

If you participate in the Customer Experience Improvement Program, you can run health checks and send the data to VMware for advanced analysis. Click the Retest with Online health button.

For more information about vSAN health checks, see VMware Virtual SAN Health Check Plugin Guide.

Monitoring vSAN Health on a Host

The ESXi host client is a browser-based interface for managing a single ESXi host. It enables you to manage the host when vCenter Server is not available. The host client provides tabs for managing and monitoring vSAN at the host level.

  • The vSAN tab displays basic vSAN configuration.

  • The Hosts tab displays the hosts participating in the vSAN cluster.

  • The Health tab displays host-level health checks.