Why do I see a vSphere console configuration issue when I add a high-availability cluster?

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When you add a high availability (HA) cluster configuration with only one file share, the following configuration issue is seen on the VMware ESXi™ hosts:

The number of heartbeat datastores for host is 1, which is less than required: 2

This issue occurs if redundancy is not in shared storage to allow for data store heart beating.

For more information about how to fix the problem, see HA error: "The number of heartbeat datastores for host is 1, which is less than required: 2".