Your network contains three servers named HV1, HV2, and Server1 that run Windows Server 2012
R2. HV1 and HV2 have the Hyper-V server role installed.
Server1 is a file server that contains 3 TB of free disk space.
HV1 hosts a virtual machine named VM1. The virtual machine configuration file for VM1 is stored
in D:\VM and the virtual hard disk file is stored in E:\VHD.
You plan to replace drive E with a larger volume.
You need to ensure that VM1 remains available from HV1 while drive E is being replaced.
You want to achieve this goal by using the minimum amount of administrative effort.
What should you do?

A.
Perform a live migration to HV2.

B.
Add HV1 and HV2 as nodes in a failover cluster. Perform a storage migration to HV2.

C.
Add HV1 and HV2 as nodes in a failover cluster. Perform a live migration to HV2.

D.
Perform a storage migration to Server1.

Explanation:

‘Using a minimum amount of adminitrative effort’ is the always key for this type of questions.
They will give multiple possible solutions, but with that key in mind, D is the answer.
A,C is not the answer because VM1 has to remain in HV1
B is possible, but it takes lots of effort to set up cluster.
D seems the best answer. You just do storage migration lively to another server, then bring back
when large disk is insert to hot swap bay.