You can initiate a health test on your vSAN cluster to verify that the cluster components are working as expected.
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.
To access a proactive test, select your vSAN cluster in the vSphere Client, and click the Monitor tab. Click vSAN > Proactive Tests.