Home VM Tips 2 Ways to Easily Expand Hyper-V Disk

2 Ways to Easily Expand Hyper-V Disk

2024-03-26 | Iris Lee

Table of contents
  • Expand Hyper-V VM disk using Hyper-V Manager
  • Expand Hyper-V VM disk using PowerShell
  • How to fully protect Hyper-V environment?
  • Hyper-V disk expanding FAQs
  • Conclusion
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Hyper-V is a virtualization platform developed by Microsoft that allows users to create and manage virtual machines. One of the common tasks when managing VMs is managing disk space. In the process of using a virtual machine, as the system runs and data accumulates, the disk space may gradually be exhausted, causing the virtual machine to run slowly or be unable to continue to store new data. This article will introduce in detail the solution to the problem of insufficient virtual machine disk space to help users quickly restore the normal operation of the virtual machine.

In Hyper-V, you can expand a virtual hard disk to increase the storage capacity available to a virtual machine. Expanding a Hyper-V VM disk involves increasing the size of the virtual hard disk (VHD or VHDX file) associated with a virtual machine.

There are 2 ways to expand a Hyper-V VM disk.

Expand Hyper-V VM disk using Hyper-V Manager

1. In the Hyper-V Manager, click on the VM you want to modify in the list of virtual machines.

2. Edit the Virtual Hard Disk:

Right-click on the VM and select Settings.

Hyper-V expand disk

Under the Hardware list, select the hard drive you want to expand.

Hyper-V expand disk

Click on the “Edit” button within the “Virtual hard disk” area.

3. In the Edit Virtual Hard Disk Wizard, select the “Expand” option and click Next.

Hyper-V expand disk

4. Enter the new size for the virtual hard disk. The size you enter will be the new maximum size for the virtual hard disk.

Hyper-V expand disk

5. Click Next and then finish to apply the changes.

6. Extend the volume within the VM:

After expanding the virtual hard disk, you need to extend the volume within the guest operating system to make use of the new space.

Start the VM, log in, and use the Disk Management tool to extend the volume. Right-click the partition you want to extend and select “Extend Volume”.

Hyper-V expand disk

Then follow the Extend Volume Wizard to finish the whole process.

Expand Hyper-V VM disk using PowerShell

If you prefer using PowerShell, you can accomplish the same task with the following steps:

1. Open PowerShell as an Administrator.

2. Get the VHD/VHDX File Path:

Use the “Get-VMHardDiskDrive” command to find the path to the VHD/VHDX file you want to expand.

Get-VMHardDiskDrive -VMName “YourVMName”

3. Expand the VHD/VHDX File:

Use the “Resize-VHD” command to resize the disk. Replace “PathToVHD” and “NewSize” with your actual situation.

Resize-VHD -Path "C:\PathToVHD\DiskName.vhdx" -SizeBytes NewSize

4. Extend the volume within the VM:

After expanding the virtual hard disk, you also need to start the VM and extend the volume using Disk Management as described above.

How to fully protect Hyper-V environment?

Before performing these operations, it is recommended to back up your Hyper-V VMs in case something goes wrong and results in data loss.

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It only takes 4 steps to backup Hyper-V VMs with Vinchin Backup & Recovery:

1. Select the backup object.

Select the backup object

2. Select backup destination.

Select backup destination

3. Select backup strategies.

Select backup strategies

4. Review and submit the job.

Review and submit the job

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Hyper-V disk expanding FAQs

1. Q: How do I free up space on Hyper-V?

A: Here are some general strategies to free up space:

2. Q: What is the difference between expanding a VHD and a VHDX file?

A: VHDX is a newer format that supports larger disk sizes (up to 64 TB), is more resilient to power failure events, and can be expanded while the VM is running. VHD is an older format with a maximum size of 2 TB and generally requires the VM to be offline to resize.


Managing disk space is a critical aspect of virtual machine administration, and Hyper-V provides flexible options for expanding virtual hard disks when additional storage is needed. The process can be accomplished through either the Hyper-V Manager or PowerShell, each offering a straightforward workflow. With Hyper-V Manager, the graphical interface guides you through expanding the disk, while PowerShell commands provide a scriptable and often faster alternative for experienced users.

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Categories: VM Tips