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VCP550 · Question #85

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

The correct answer is A. One of the hosts in the cluster is not attached to the datastores planned for use with HA.. VMware HA uses datastore heartbeating to detect host failures, requiring each host to access at least 2 designated heartbeat datastores. If a host lacks access to those datastores, it reports 0 heartbeat datastores and triggers this error.

Establish and Maintain Service Levels

Question

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?

Options

  • AOne of the hosts in the cluster is not attached to the datastores planned for use with HA.
  • BThe hosts in the cluster do not have Storage DRS configured on one or more of their datastores.
  • COne of the hosts in the cluster has an invalid Storage Policy configured on one or more of their datastores.
  • DThe hosts in the cluster contain one or more datastores configured with a 1 MB block size.

How the community answered

(39 responses)
  • A
    67% (26)
  • B
    5% (2)
  • C
    10% (4)
  • D
    18% (7)

Why each option

VMware HA uses datastore heartbeating to detect host failures, requiring each host to access at least 2 designated heartbeat datastores. If a host lacks access to those datastores, it reports 0 heartbeat datastores and triggers this error.

AOne of the hosts in the cluster is not attached to the datastores planned for use with HA.Correct

VMware HA datastore heartbeating requires each host in the cluster to have access to at least 2 shared datastores so that HA can distinguish between a host failure and a network isolation event. If one host is not connected to the datastores designated for heartbeating, it will report 0 heartbeat datastores available. This directly produces the error message shown during HA cluster configuration.

BThe hosts in the cluster do not have Storage DRS configured on one or more of their datastores.

Storage DRS manages datastore load balancing and I/O distribution and has no bearing on HA heartbeat datastore connectivity or configuration.

COne of the hosts in the cluster has an invalid Storage Policy configured on one or more of their datastores.

Storage Policies govern VM storage placement rules and do not affect whether a host can access or use HA heartbeat datastores.

DThe hosts in the cluster contain one or more datastores configured with a 1 MB block size.

VMFS block size is a datastore formatting parameter and does not influence HA heartbeat datastore counts or availability.

Concept tested: VMware HA datastore heartbeating host connectivity requirements

Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.avail.doc/GUID-F01F7EB8-FF9D-45E2-A093-5F56A788D027.html

Topics

#vSphere HA#heartbeat datastores#cluster configuration#datastore connectivity

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