An administrator is designing a vSphere cluster with the VSAN default policy. The requirement is to maintain full redundancy of data and virtual disks dur

ing any patching or maintenance of this cluster.

What is needed to meet the needs of this scenario?

A. A minimum of four hosts in the cluster

B. VMware Proactive HA

C. Multiple disk groups per host

D. Use of RAID-5/6 erasure coding

Explanation

:

When not using a witness, there is a minimum requirement of 3 ESXi hosts in a vSAN cluster. This is the same for all versions. While vSAN fully supports 3-node configurations, they can behave differently than configurations with 4 or greater nodes. In pa

rticular, in the event of a failure there is no way for vSAN to rebuild components on another host in the cluster to tolerate another failure. Also with 3-node configurations, vSAN does not have the ability to migrate all data from a node during maintenanc

e.

Design decision: Consider 4 or more nodes for the vSAN cluster design for maximum availability

References: VMware vSAN Design and Sizing Guide. Page: 51