You can initiate a health test on your vSAN cluster to verify that the cluster components are working as expected.

Note: You must not conduct the proactive test in a production environment as it creates network traffic and impacts the vSAN workload.
Run the VM creation test to verify the vSAN cluster health. Running the test creates a virtual machine on each host in the cluster. The test creates a VM and deletes it. If the VM creation and deletion tasks are successful, assume that the cluster components are working as expected and the cluster is functional.

Run the Network performance test to detect and diagnose connectivity issues, and to make sure the network bandwidth between the hosts supports the requirements of vSAN. The test is performed between the hosts in the cluster. It verifies that the network bandwidth between hosts, and reports a warning if the bandwidth is less than 850Mbps. You can run the proactive test at a maximum speed limit of 10Gbps. In vSAN ESA, the proactive test reports error when the result is zero bps and the Health Status displays the test results as info when the result is a non-zero number.

To access a proactive test, select your vSAN cluster in the vSphere Client, and click the Monitor tab. Click vSAN > Proactive Tests.