By Doug Lowe

Before you create a virtual machine, it’s best to first create a virtual disk for the machine to use. Note that you can create a virtual disk at the same time that you create a virtual machine. However, creating the virtual disk first gives you more flexibility. So, it’s recommended that you create virtual disks and virtual machines separately. Here are the steps to create a virtual disk:

1In Hyper-V Manager, click New and then choose Hard Disk.

This brings up the New Virtual Hard Disk Wizard.

2Click Next.

You’re asked which disk format to use.

3Select VHDX, and then click Next.

Use the VHDX format, which can support drives larger than 2TB. When you click Next, the Choose Disk Type option page is displayed.

4Select the disk type you want to use.

The options are Fixed Size, Dynamically Expanding, or Differencing. Choose Fixed Size if you’re concerned about the performance of the disk; otherwise, choose Dynamically Expanding.

5Click Next.

The page shown here appears.

6Specify the name and location of the new disk.

Type any name you want for the virtual disk drive. Then, click the Browse button to browse to the disk location where you want Hyper-V to create the .vhdx file.

Make sure you choose a location that has enough disk space to create the .vhdx file. If you’re creating a dynamically expanding disk, you should ensure that the location has enough space to accommodate the drive as it grows.

7Click Next.

The Configure Disk page appears.

8Specify the maximum size for the disk drive.

This page also allows you to copy data either from an existing physical disk drive or from an existing virtual disk drive. Copying data from an existing physical drive is a quick way to convert a physical computer to a virtual computer; just copy the physical disk to a virtual disk, and then use the new virtual disk as the basis for a new virtual machine.

9Click Next.

A confirmation screen appears, summarizing the options you’ve selected for your new disk.

10Click Finish.

The new disk is created. Note that if you selected Fixed Disk as the disk type, creating the disk can take a while because the entire amount of disk storage you specified is allocated to the disk. Be patient.

You’re done! You’ve now created a virtual disk that can be used as the basis for a new virtual machine.