You are designing a disaster recovery solution to Azure for an on-premises VMware virtual … — Microsoft Azure Solutions Architect (AZ-305)

You are designing a disaster recovery solution to Azure for an on-premises VMware virtual machine named VM1. The virtual machine hosts a web application and has the following disk configuration and write churn metrics:

- Disk 1 (OS): Standard SSD, $4\text{ MB/s}$ write churn
- Disk 2 (Temp Data): Premium SSD, $85\text{ MB/s}$ write churn (contains temporary cache files that do not need to be preserved)
- Disk 3 (App Logs): Premium SSD, $12\text{ MB/s}$ write churn

The solution must meet a Recovery Point Objective (RPO) of $2\text{ hours}$ and a Recovery Time Objective (RTO) of $4\text{ hours}$ .

Which of the following actions should you recommend? (Select TWO).

Replicate Disk 1 and Disk 3, and exclude Disk 2 from the replication configuration.Cevap
Configure Azure Site Recovery to replicate the supported disks of the virtual machine to Azure.Cevap
C
Replicate all three disks to Azure to ensure that the complete virtual machine state is preserved.
D
Replicate Disk 2 to an Ultra Disk target in Azure to accommodate the high write churn.

Cevap

Recommending the replication of Disk 1 and Disk 3 while excluding Disk 2, and configuring Azure Site Recovery for the virtual machine.

Azure Site Recovery supports a maximum write churn of

25\text{ MB/s}

per Premium SSD and

10\text{ MB/s}

per Standard SSD/HDD for VMware virtual machines. Disk 2's churn of

85\text{ MB/s}

is well above this threshold. Because Disk 2 contains temporary cache data that does not need to be restored during a failover, it can be excluded from replication. This keeps the active replication churn within supported limits. Azure Site Recovery is the designated service to orchestrate the replication and failover of virtual machines to meet low RPO/RTO parameters.

Adım Adım Çözüm

Analyze the write churn of each virtual machine disk against the supported limits of Azure Site Recovery.

Disk 1 (

4\text{ MB/s}

) and Disk 3 (

12\text{ MB/s}

) are within standard limits, but Disk 2 (

85\text{ MB/s}

) exceeds the

25\text{ MB/s}

limit for Premium SSDs.

Ensuring the workloads are within replication boundaries prevents deployment and operational failures.

Identify if any high-churn disks can be excluded based on their data type.

Disk 2 contains only temporary cache files and can be safely excluded from the replication setup.

Excluding temporary or scratch disks is a supported method to bypass churn limits and reduce replication overhead.

Recommend Azure Site Recovery to coordinate the replication of the remaining compatible disks to meet the disaster recovery goals.

The final design uses Azure Site Recovery with Disk 1 and Disk 3 replicated, and Disk 2 excluded.

This configuration successfully meets the RPO and RTO targets while remaining fully within Azure Site Recovery's support limitations.

Anahtar Kavram

Excluding high-churn temporary disks from Azure Site Recovery replication to stay within supported boundaries.

Soru

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Adım Adım Çözüm

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