Which quorum configurations might be considered depending on shared storage and cluster size?

• A. Node majority
• B. Disk majority (disk witness)
• C. Node and Disk majority
• D. All of the above

Answer: (D)

Quorum is the minimum number of votes required for the cluster to operate safely. Depending on whether you have shared storage and on how many nodes are in the cluster, different quorum configurations can be used.

Node majority relies on the votes of the nodes themselves; the cluster stays online as long as a majority of the nodes are up. This works well when you have a clear majority of nodes and solid network connectivity.

Disk majority uses a disk witness to provide an extra vote, so the cluster can maintain quorum even if some nodes are down. This option is useful when you have shared storage with a witness disk available and you want protection against node failures without requiring all nodes to be online.

Node and Disk majority combines both node votes and a disk witness. This setup is helpful in environments with even numbers of nodes or where you want to guard against split-brain scenarios by having the disk witness contribute to the majority.

Because the right choice depends on the specific cluster size and whether shared storage (for a disk witness) is available, all of these configurations might be considered in practice. Hence, all of the above.