Exam 5V0-21.20 topic 1 question 32 discussion

Actual exam question from VMware's 5V0-21.20

Question #: 32
Topic #: 1

An administrator arrives at work and begins their morning checks on a four node, all-flash vSAN Cluster. They notice the vSAN datastore reached 99% capacity due to a single node failure.
How can the administrator provide temporary relief?

A. change FTT=1 with RAID-5 (Erasure coding) to FTT=1 with RAID-1 (Mirroring)
B. change FTT=1 with RAID-1 (Mirroring) to FTT=1 with RAID-5 (Erasure coding)
C. change FTT=1 with RAID-1 (Mirroring) to FTT=0 No data redundancy
D. change FTT=1 with RAID-5 (Erasure coding) to FTT=0 No data redundancy

Show Suggested Answer

Suggested Answer: B 🗳️

by Rabbit117 at March 9, 2021, 9:17 a.m.

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Rabbit117

Highly Voted 4 years, 3 months ago

I think C as this will free up the capacity used by the mirror copies of the components. B is incorrect as you will require a min of 4 hosts for Raid 5. Changing from Raid 1 to Raid 5 will require additional space during the rebuild process.

upvoted 7 times

Parziwolle

4 years, 2 months ago

But there are 4-nodes - or?: "...begins their morning checks on a four node, all-flash vSAN Cluster."

upvoted 1 times

majkelaliroza

4 years, 1 month ago

Yeap, there are four nodes and one of them crashed, so still we have 3 nodes and RAID5 will only be able to exist on 3 nodes with Force Provisioning ( but there is nothing about it in any of the answers)

upvoted 1 times

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jsi928

Most Recent 1 year, 11 months ago

C. Since it did not say it was now out of compliance (RAID 5 requires a min of 4 hosts) and now there are only 3. Plus RAID 1 FTT1 only requires 3 and Rec 4 so it would still be in compliance and takes up 2X the space, thus the 99% capacity.

upvoted 1 times

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Lazylinux

3 years, 5 months ago

I would go with C, since no compliance was violated hence tells me it is Mirror FTT1 existing and loss of one host only impacted capacity and not compliance , how ever C is NOT supported by VMware but doable Important: Use of a VM storage policy with FTT = 0 (No Data Redundancy) is not supported and can cause data loss if there is a failure or if the VM becomes unresponsive. https://docs.vmware.com/en/VMware-Cloud-on-AWS/services/com.vmware.vsphere.vmc-aws-manage-data-center-vms.doc/GUID-EDBB551B-51B0-421B-9C44-6ECB66ED660B.html

upvoted 2 times

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[Removed]

4 years, 1 month ago

I think C as this will free up the capacity used by the mirror copies of the components.

upvoted 2 times

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