2V0-621 · Question #60
Which two statements are true regarding Virtual SAN Fault Domains? (Choose two.)
The correct answer is A. They enable Virtual SAN to tolerate the failure of an entire physical rack. B. Virtual SAN ensures that no two replicas are provisioned on the same domain. vSAN Fault Domains protect against rack-level failures by ensuring that replicas of any object are always placed in different fault domains.
Question
Which two statements are true regarding Virtual SAN Fault Domains? (Choose two.)
Options
- AThey enable Virtual SAN to tolerate the failure of an entire physical rack.
- BVirtual SAN ensures that no two replicas are provisioned on the same domain.
- CVirtual SAN ensures that all replicas are provisioned on the same domain.
- DThey require VMware High Availability (HA) to ensure component distribution across domains.
How the community answered
(46 responses)- A78% (36)
- C15% (7)
- D7% (3)
Why each option
vSAN Fault Domains protect against rack-level failures by ensuring that replicas of any object are always placed in different fault domains.
Fault Domains let an administrator group ESXi hosts by physical rack or chassis so that vSAN treats the entire group as a single potential failure unit, enabling the cluster to survive a complete rack failure - such as a top-of-rack switch failure or a power outage - without data loss.
vSAN's object placement engine is fault domain aware and enforces a policy that no two replicas or witness components of the same storage object are placed within the same fault domain, guaranteeing that a single domain failure cannot cause data unavailability.
Placing all replicas in the same fault domain is the opposite of the intended behavior and would mean a single rack failure destroys every copy of the data, completely negating the protection that fault domains are designed to provide.
VMware HA is not required for vSAN Fault Domain functionality; vSAN's own storage policy engine independently governs component placement across fault domains without any dependency on HA being enabled.
Concept tested: vSAN Fault Domain rack-level failure tolerance and replica placement
Source: https://docs.vmware.com/en/VMware-vSAN/7.0/com.vmware.vsphere.vsan.doc/GUID-A7F2B1B2-5B5B-4B2E-A7F2-B1B25B5B4B2E.html
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