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Question

You have two Azure virtual machines that run Windows Server.
You plan to create a failover cluster that will host the virtual machines.
You need to configure an Azure Storage account that will be used by the cluster as a cloud witness. The solution must maximize resiliency.
Which type of redundancy should you configure for the storage account?

 

Proposed answer
  • A. Geo-zone-redundant storage (GZRS)
  • B. Locally-redundant storage (LRS)
  • C. Zone-redundant storage (ZRS)
  • D. Geo-redundant storage (GRS)
Suggested answer
  • C. Zone-redundant storage (ZRS)

 

Comments
sanni

Highly Voted 2 years, 2 months ago 

I think Geo-zone-redundant storage (GZRS) is the correct answer.

upvoted 6 times 

[Removed]

Highly Voted 1 year, 4 months ago 

if the cluster is on-prem ----> Locally-redundant storage (LRS) but if the cluster is in Azure -----> Zone-redundant storage

upvoted 5 times 

starseed

Most Recent 3 months ago 

C. Zone-redundant storage (ZRS)

upvoted 1 times 

SanMan_NZ

9 months, 2 weeks ago 

Unless I am missing something, the question does not call out if the servers are in separate availability zones or in the same one? Without knowing this, and the fact that the following statement is in the supplied link seems to be true, I am not sure, I will go with C-ZRS as this has the most support in this forum however to me a stupid question... """"When creating your Azure Storage account, if the cluster you're configuring Cloud Witness for is on-premises or in Azure within the same Azure region and availability zones, select Locally-redundant storage (LRS) when configuring the Replication field. If your cluster is in the same Azure region but in different availability zones, select Zone-redundant storage (ZRS) instead""""""

upvoted 2 times 

Fakecon

11 months, 1 week ago 

I think for cluster you need networking <=5ms seconds round trip. So anything outside ZRS wouldn't work for HA environments

upvoted 3 times 

syu31svc

1 year, 7 months ago 

Selected Answer: C

"two Azure virtual machines" ZRS should suffice answer is C

upvoted 2 times 

prepper666

1 year, 8 months ago 

ZRS. For Replication, select Locally-redundant storage (LRS) or Zone-redundant storage (ZRS) as applicable. Failover Clustering uses the blob file as the arbitration point, which requires some consistency guarantees when reading the data. Therefore, you must select Locally-redundant storage for Replication type when the Cloud Witness is for a cluster that resides on premises, or it's a cluster in Azure which isn't deployed across different availability zones in the same region. When the cluster nodes are in the same region but different availability zone, use Zone-redundant storage as Replication type.

upvoted 2 times 

kijken

1 year, 9 months ago 

To maximize resiliency for the Azure Storage account used by the failover cluster as a cloud witness, you should configure geo-redundant storage (GRS). GRS provides replication of data to a secondary region, which is located hundreds of miles away from the primary region. This ensures that your data is highly available in case of a regional outage or disaster. Option A, Geo-zone-redundant storage (GZRS), is not an available redundancy option for Azure Storage accounts. Option B, Locally-redundant storage (LRS), provides redundancy within a single data center. Option C, Zone-redundant storage (ZRS), replicates data across different availability zones within a single region. Therefore, option D, Geo-redundant storage (GRS), is the correct answer to maximize resiliency for the storage account used by the failover cluster as a cloud witness.

upvoted 2 times 

Leocan

1 year, 12 months ago 

Selected Answer: C

must select Locally-redundant storage for Replication type when the Cloud Witness is for a cluster that resides on premises, or it's a cluster in Azure which isn't deployed across different availability zones in the same region. When the cluster nodes are in the same region but different availability zone, use Zone-redundant storage as Replication type.

upvoted 4 times 

joehoesofat

2 years ago 

Selected Answer: C

The answer is C but- if you happen to get the same question with ON prem- then it has to be LRS_ easy to miss this on a test https://learn.microsoft.com/en-us/windows-server/failover-clustering/deploy-cloud-witness

upvoted 2 times 

Jawad1462

2 years, 2 months ago 

Selected Answer: C

Is the correct answer

upvoted 2 times 

GoforIT21

2 years, 2 months ago 

No, Zone-redundant storage is definitely correct. Read the link provided: "For Replication, select Locally-redundant storage (LRS) or Zone-redundant storage (ZRS) as applicable." (https://learn.microsoft.com/en-us/windows-server/failover-clustering/deploy-cloud-witness)

upvoted 3 times 

GoforIT21

2 years, 2 months ago 

This might be outdated information. I recently saw in a lab environment, that Geo-Redundant Storage (GRS) was also listed as a redundancy option. So by now that seems to be possible.

upvoted 4 times