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AZ-801 · Question #37

You have a failover cluster named Cluster1 that has the following configurations: Number of nodes: 6 Quorum: Dynamic Quorum Witness: File share, Dynamic witness What is the maximum number of nodes…

The correct answer is C. 3. In a 6-node failover cluster with a File Share Witness and Dynamic Quorum/Witness, a maximum of three nodes can fail simultaneously while maintaining quorum.

Implement and manage Windows Server high availability

Question

You have a failover cluster named Cluster1 that has the following configurations: Number of nodes: 6 Quorum: Dynamic Quorum Witness: File share, Dynamic witness What is the maximum number of nodes that can fail simultaneously while maintaining quorum?

Options

  • A1
  • B2
  • C3
  • D4
  • E5

How the community answered

(28 responses)
  • A
    7% (2)
  • B
    4% (1)
  • C
    79% (22)
  • D
    11% (3)

Why each option

In a 6-node failover cluster with a File Share Witness and Dynamic Quorum/Witness, a maximum of three nodes can fail simultaneously while maintaining quorum.

A1

If only 1 node can fail, it implies a more restrictive quorum model than a 6-node cluster with a witness allows.

B2

If only 2 nodes can fail, it is still too restrictive as a 6-node cluster with a witness can tolerate more failures.

C3Correct

A 6-node cluster with a File Share Witness initially has 7 votes (6 nodes + 1 witness). For quorum, a majority (4 votes) is required. With Dynamic Quorum, nodes that fail cleanly lose their vote. Even if 3 nodes fail abruptly, the remaining 3 nodes and the witness (4 votes) can maintain quorum, as this constitutes a majority of the active votes or the original total if failures are abrupt.

D4

If 4 nodes fail, only 2 nodes and the witness remain (3 votes), which is not enough to maintain quorum (4 votes required from original 7, or majority of dynamically adjusted votes if all failed nodes lose votes).

E5

If 5 nodes fail, only 1 node and the witness remain (2 votes), which is far below the required majority for quorum.

Concept tested: Failover Cluster quorum and dynamic quorum

Source: https://learn.microsoft.com/en-us/windows-server/failover-clustering/manage-cluster-quorum

Topics

#Failover Clustering#Quorum#High Availability#Windows Server

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