An administrator has been tasked with enabling High Availability (HA) on a cluster in a vSphere 6.x environment with default settings. The cluster configures
properly and there are no errors. The next day when powering on a virtual machine, an error is presented:
Not Enough Failover Resources
Which three scenarios are likely causes of this error message? (Choose three.)
A.
The default VM Monitoring Sensitivity is set too high.
B.
There are not enough datastore heartbeat datastores configured by default.
C.
The default slot size in the cluster is set too high.
D.
There are virtual machines with large CPU reservations.
E.
A host is in maintenance mode for a replacement of a failed Hard Drive.
Explanation:
This error message happens when the default slot size in the cluster is too high or the virtual machines with large CPU reservations are used. It also happens when
the host is in maintenance mode for the replace of a failed hard drive.
https://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.availability.doc_41/c_useha_works.html