vSphere HA uses datastore heartbeating to distinguish between hosts that have failed and hosts that reside on a network partition. Datastore heartbeating allows vSphere HA to monitor hosts when a management network partition occurs and to continue to respond to failures that occur.

Use the Configure Datastore Heartbeating dialog box to specify the datastores that you want to be used for this purpose.


Launch the vSphere Client and log in to a vCenter Server system.


  1. In the vSphere Client, display the cluster in the inventory.
  2. Right-click the cluster and select Edit Settings.
  3. In the left pane of the Cluster Settings dialog box, select Datastore Heartbeating.
  4. To instruct vSphere HA about how to select the datastores and how to treat your preferences, choose from the following options:
    Table 1.
    Datastore Heartbeating Options
    Select only from my preferred datastores
    Select any of the cluster datastores
    Select any of the cluster datastores taking into account my preferences
  5. In the Datastores Available for Heartbeating pane, select the datastores that you want to use for heartbeating.
    The datastores listed are those shared by more than one host in the vSphere HA cluster. When a datastore is selected, the lower pane displays all the hosts in the vSphere HA cluster that can access it.
  6. Click OK.