Home » VMware » VCP550D » Why would vCenter Server identify an alternative preferred datastore over the administrator’s preference?
A vSphere administrator configures a preferred heartbeat datastore in an HA/DRS cluster configuration. The vCenter Server identifies an alternative preferred datastore.
Why would vCenter Server identify an alternative preferred datastore over the administrator’s preference?
A. The selected datastore contains powered-on virtual machines.
B. The selected datastore is formatted with a 1 MB block size.
C. The selected datastore is an NFS datastore.
D. The selected datastore is not accessible to all of the hosts.
Correct Answer: D
Explanation/Reference:
Explanation:
If an administrator configures a preferred heartbeat datastore that isn’t accessible by all hosts in the cluster, vCenter Server will select a datastore that is accessible by all hosts in the cluster.
When the master host in a vSphere HA cluster cannot communicate with a slave host over the management network, the master host uses datastore heartbeating to determine whether the slave host has failed, is in a network partition, or is network isolated. If the slave host has stopped datastore heartbeating, it is considered to have failed and its virtual machines are restarted elsewhere. vCenter Server selects a preferred set of datastores for heartbeating. This selection is made to maximize the number of hosts that have access to a heartbeating datastore and minimize the likelihood that the datastores are backed by the same LUN or NFS server.
Incorrect Answers:
A: The heartbeat datastore can contain virtual machines. Therefore, this answer is incorrect.
B: The block size is not considered when identifying suitable heartbeat datastores. Therefore, this answer is incorrect.
C: The heartbeat datastore can be an NFS datastore. Therefore, this answer is incorrect.
References:
https://pubs.vmware.com/vsphere-55/index.jsp#com.vmware.vsphere.avail.doc/GUID-0502B198-F5F7-4101-969C-C5B6F364C678.html