Administering Windows Server Hybrid Core Infrastructure (AZ-800) Practice

What is the minimum number of disks required to create a virtual disk with the three-way mirroring storage layout?

1. 3

2. 4

3. 5

4. 6

The correct answer is: 5

To establish a virtual disk utilizing the three-way mirroring storage layout, a fundamental understanding of how mirroring functions is crucial. In a three-way mirroring setup, data is stored concurrently on three separate disks. This means that for every piece of data written to the virtual disk, it is simultaneously written to three different physical disks. This setup not only enhances data redundancy by providing multiple copies of the data but also improves availability in case one of the disks fails. While three disks are required for the primary mirror of the data, it’s also essential to consider additional disks that may be required for fault tolerance and effective storage management. In the instance of utilizing three-way mirroring, you need a minimum of three disks for the primary mirror and at least one additional disk to facilitate fault tolerance. It is standard practice to add another disk to ensure at least one copy of the data remains accessible even if one copy fails. This brings the total to a minimum of four disks. However, when considering the additional disk for fault tolerance alongside the requirement for at least three copies of each piece of data stored, the final calculation should yield a minimum of five disks—for a configuration that guarantees the persistence of all three mirrored copies while also allowing for fault tolerance. Therefore, for