Exam 5V0-21.19 topic 1 question 38 discussion

Actual exam question from VMware's 5V0-21.19

Question #: 38
Topic #: 1

An architect is asked to design a vSAN cluster with these requirements:
-Supports erasure coding storage policy
-Minimized inaccessibility from single device failures
-Ability to re-protect data after a failure
The desired configuration should be able to survive a single failure.
Which configuration satisfies the design requirements?

A. 3-node hybrid vSAN cluster
B. 4-node hybrid vSAN cluster
C. 4-node all-flash vSAN cluster
D. 5-node all-flash vSAN cluster

Show Suggested Answer

Suggested Answer: D 🗳️

by LFC at May 17, 2020, 2:38 p.m.

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LFC

Highly Voted 5 years, 1 month ago

Answer D - Min no of nodes in Raid 5 _ erasure coding is 4 , To satisfy ability to re-protect data after a failure Need one additional node. So the total node count is 5.

upvoted 7 times

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Lazylinux

Most Recent 3 years, 6 months ago

Selected Answer: D

D for sure

upvoted 1 times

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AllenHuang

4 years, 2 months ago

D is correct

upvoted 1 times

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diegof1

4 years, 5 months ago

D is the correct answer RAID 5 just needs 4 hosts to support FTT=1. However, the statement said -Ability to re-protect data after a failure, to support this you have to ensure 4 hosts available after one failure. Thus, you will need 5 hosts in the cluster.

upvoted 3 times

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LCOJ

5 years ago

I agree with D answer.

upvoted 3 times

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adelbelkis2

5 years, 1 month ago

I believe it's D. Because of : Ability to re-protect data after a failure, if we have 4 nodes we won't be able to reprotect data as we'll have less than the minimim hosts which is "4" (Raid 5)

upvoted 3 times

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