2V0-621 · Question #61
An administrator created a six node Virtual SAN cluster, created a fault domain, and moved three of the six nodes into that domain. A node that is a member of the fault domain fails. What is the…
The correct answer is A. The remaining two fault domain members are treated as failed. In vSAN fault domains, a single node failure causes the entire fault domain to be treated as failed, not just the individual node, because the domain represents a shared failure boundary like a rack.
Question
An administrator created a six node Virtual SAN cluster, created a fault domain, and moved three of the six nodes into that domain. A node that is a member of the fault domain fails. What is the expected result?
Options
- AThe remaining two fault domain members are treated as failed.
- BThe remaining two fault domain members stay protected by the domain.
- COne of the non-member nodes will be automatically added to the fault domain.
- DVMware High Availability will restart virtual machines on remaining nodes in the domain.
How the community answered
(22 responses)- A64% (14)
- B9% (2)
- C5% (1)
- D23% (5)
Why each option
In vSAN fault domains, a single node failure causes the entire fault domain to be treated as failed, not just the individual node, because the domain represents a shared failure boundary like a rack.
vSAN fault domains model physical failure boundaries such as racks. When any member node of a fault domain fails, vSAN treats the entire fault domain as unavailable, meaning the remaining two nodes in that domain are also considered failed for the purposes of data availability and placement policy enforcement.
Fault domain members do not stay independently protected when a peer node in the same domain fails - the whole domain is declared failed as a single fault unit.
vSAN does not automatically add non-member nodes to a fault domain; fault domain membership is an administrator-configured static assignment.
vSphere HA restarts VMs on surviving hosts across the cluster, not specifically within the same failed fault domain, which would defeat the purpose of fault isolation.
Concept tested: vSAN fault domain failure behavior
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-FE7DBC6E-C0B8-4145-9D96-4D5A7CE5EF3E.html
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