2V0-621 · Question #208
Refer to the Exhibit. An administrator recently created a Virtual SAN but no Storage Policies were defined. A few virtual machines were deployed to this cluster. The administrator analyzes the default
The correct answer is A. Losing one cluster node will not affect data availability. B. Losing one Hard Disk in a cluster node will not affect data availability.. The default vSAN storage policy sets 'Number of Failures to Tolerate' (FTT) to 1, meaning the cluster maintains an additional data replica that protects availability when any single host or disk is lost.
Question
Refer to the Exhibit. An administrator recently created a Virtual SAN but no Storage Policies were defined. A few virtual machines were deployed to this cluster. The administrator analyzes the default Virtual SAN policy as shown in the Exhibit. Based on the exhibit, which two statements are true? (Choose two.)
Exhibit
Options
- ALosing one cluster node will not affect data availability.
- BLosing one Hard Disk in a cluster node will not affect data availability.
- CCreating a virtual machine Swap file will fail if it violates default storage policy.
- DCreating a virtual machine will succeed even if it violates default storage policy.
How the community answered
(24 responses)- A83% (20)
- C4% (1)
- D13% (3)
Why each option
The default vSAN storage policy sets 'Number of Failures to Tolerate' (FTT) to 1, meaning the cluster maintains an additional data replica that protects availability when any single host or disk is lost.
With FTT=1, vSAN keeps at least two copies of every data object across different hosts. Losing one cluster node still leaves a complete replica accessible on the remaining hosts, so data availability is maintained.
FTT=1 also tolerates the failure of a single hard disk within any cluster node because the redundant object replica stored on a separate host remains fully accessible.
vSAN applies a dedicated, more permissive internal policy to VM swap files (typically FTT=0) rather than the default storage policy, so swap file creation will not fail due to a default policy violation.
The default vSAN policy has 'Force Provisioning' disabled, meaning VM creation will fail rather than succeed if the cluster lacks the resources to satisfy the FTT=1 requirement.
Concept tested: vSAN default storage policy FTT fault tolerance
Source: https://docs.vmware.com/en/VMware-vSAN/7.0/com.vmware.vsphere.vsan.doc/GUID-FE61CF17-5B84-4D3D-B42B-A61C4D0B8A20.html
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