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NCP Exam - Question 10


A cluster has RF2. The cluster loses two drives on different nodes in the same storage tier.

What is the effect on the replicas of the VMs?

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Correct Answer: AB

In a cluster with RF2 (Replication Factor 2), the system is designed to tolerate the failure of one component (e.g., a drive or node) without data loss. If a second drive fails on a different node before the cluster has had time to rebuild (heal) the lost data, there is a risk of data loss. Therefore, some VM data may be lost in the described scenario.

Discussion

12 comments
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GermaniaOption: A
Nov 10, 2020

Your example is pointing to a post, however the courseware says but if you remember the training, it says in RF2, losing a second drive in another node before the cluster heals "can result in some VM data loss"

GermaniaOption: A
Nov 16, 2020

A = Some VM data "may" be lost. "A" matched courseware info on RF2 where it states losing a second drive in another node before the node heals "can result in some VM data loss"

Shahj8Option: A
Nov 20, 2020

A is the correct answer

soujowOption: A
Dec 16, 2020

"A" https://next.nutanix.com/how-it-works-22/vms-behavior-when-disks-fault-on-2-different-nodes-38630

hm211Option: A
Jan 22, 2021

A is correct

fernandogarciaOption: A
Mar 3, 2022

A is correct, there may be some lost of data.

it_guyOption: A
Aug 4, 2022

For RF-2, we have FT-1, meaning it can sustain a single simultaneous failure. In that case. one disk or node can fail and there will be no impact to VM data or cluster operation. But, for 2 simultaneous failure it will loose some VM data. Hence, A should be correct.

kvra_01Option: A
Apr 22, 2021

In a cluster with RF2 losing a second drive in a different domain (node, block, or fack) before the cluster heals can result in some VM data loss to both replicas. So the e correct option is A.

MrSysadminOption: A
Dec 8, 2021

"A" https://next.nutanix.com/how-it-works-22/vms-behavior-when-disks-fault-on-2-different-nodes-38630

woohhaaOption: A
Jan 20, 2023

If the two disks that failed happen to have pri/ sec copies of VM data then data loss will occur. I vote A.

efransi
Nov 15, 2020

I'm still confused what the correct answer would be!

CharuKOption: A
Jun 22, 2021

A is correct, there may be some lost of data.