The following error displays during the final step of the configuration for a VMware High Availability
(HA) cluster attached to five datastores:
The number of heartbeat datastores for host is 0, which is less than requireD. 2
What condition would cause this error?
A.
One of the hosts in the cluster is not attached to the datastores planned for use with HA.
B.
The hosts in the cluster do not have Storage DRS configured on one or more of their
datastores.
C.
One of the hosts in the cluster has an invalid Storage Policy configured on one or more of their
datastores.
D.
The hosts in the cluster contain one or more datastores configured with a 1 MB block size.
Explanation:
A is correct
The datastore is not accessible by all hosts.
The number of shared datastores between all hosts is less than 2.
While implementing a vSphere High Availability (HA) configuration, you see this error on one of the ESXi 5.x hosts:
The number of heartbeat datastores for host is 1, which is less than required: 2
The number of heartbeat datastores for host is 0, which is less than required: 2
This issue occurs if there is no redundancy in shared storage to allow for datastore heartbeating. As of vSphere 5.0, vSphere HA requires a minimum of two shared datastores shared between all hosts in a cluster for proper datastore heartbeat detection to function.
Note: VMware recommends having redundancy for datastore heartbeating if vSphere HA is used.
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2004739
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