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azure-stack-edge-gpu-prepare-windows-generalized-image-iso.md

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title Prepare generalized image from ISO to deploy VMs on Azure Stack Edge Pro GPU
description Describes how to create a generalized Windows VM image starting from an ISO. Use this generalized image to deploy virtual machines on your Azure Stack Edge Pro GPU device.
services databox
author alkohli
ms.service azure-stack-edge
ms.topic how-to
ms.date 06/12/2025
ms.author alkohli

Prepare generalized image from ISO to deploy VMs on Azure Stack Edge Pro GPU

[!INCLUDE applies-to-GPU-and-pro-r-and-mini-r-skus]

To deploy VMs on your Azure Stack Edge Pro GPU device, you need to be able to create custom virtual machine (VM) images that you can use to create VMs. This article describes how to prepare a Windows VM image using ISO installation media, and then generalize that image so you can use it to deploy multiple new VMs on your Azure Stack Edge Pro GPU device.

To prepare a generalized image created from a Windows VHD or VHDX, see Prepare a generalized image from a Windows VHD to deploy VMs on Azure Stack Edge Pro GPU.

About VM images

A Windows VHD or VHDX can be used to create a specialized image or a generalized image. The following table summarizes key differences between the specialized and the generalized images.

[!INCLUDE about-vm-images-for-azure-stack-edge]

Workflow

The high-level workflow to create a generalized Windows VHD using an ISO is:

  1. Prepare the source VM using an ISO image:
    1. Create a new, blank, fixed-size VHD in Hyper-V Manager.
    2. Use that VHD to create a new virtual machine.
    3. Mount your ISO image on the DVD drive of the new VM.
  2. Start the VM, and install the Windows operating system.
  3. Generalize the VHD using the sysprep utility.
  4. Copy the generalized image to Azure Blob storage.

Prerequisites

Before you can create a generalized Windows VHD by using an ISO image, make sure that:

  • You have an ISO image for the supported Windows version that you want to turn into a generalized VHD. Windows ISO images can be downloaded from the Microsoft Evaluation Center.

  • You have access to a Windows client with Hyper-V Manager installed.

  • You have access to an Azure blob storage account to store your VHD after it's prepared.

Prepare source VM using an ISO

When you use an ISO image to install the operating system on your VM image, you start by creating a blank, fixed-size VHD in Hyper-V Manager. You then use that VHD to create a virtual machine. Then you attach the ISO image to the VM.

Create new VHD in Hyper-V Manager

Your first step is to create a new Generation 1 VHD in Hyper-V Manager, which is the source VHD for a new virtual machine.

To create the VHD, follow these steps:

  1. Open Hyper-V Manager on your client system. On the Action menu, select New and then Hard Disk.

    Select New and then Hard Disk

  2. Under Choose Disk Format, select VHD. Then select Next >.

    Choose VHD as the disk format

  3. Under Choose Disk Type, select Fixed size. Then select Next >.

    Choose Fixed size as the disk type

  4. Under Specify Name and Location, enter a name and location for your new VHD. Then select Next >.

    Enter the name and location for the VHD

  5. Under Configure Disk, select Create a new blank virtual hard disk, and enter the size of disk you would like to create (generally 20 GB or more for Windows Server). Then select Next >.

    Settings for creating a new blank virtual hard disk and specifying the size

  6. Under Summary, review your selections, and select Finish to create the new VHD. The process takes five or more minutes depending on the size of the VHD created.

    Summary of VHD settings

Create Hyper-V VM from VHD

Now use the VHD you just created to create a new virtual machine.

To create your new virtual machine, follow these steps:

  1. Open Hyper-V Manager on your Windows client.

  2. On the Actions pane, select New and then Virtual Machine.

    Select New and then Virtual Machine from the menu on the right.

  3. In the New Virtual Machine Wizard, specify the name and location of your VM.

    New Virtual Machine wizard, Specify Name and Location

  4. Under Specify Generation, select Generation 1 or Generation 2. Then select Next >.

    New Virtual Machine wizard, Choose the generation of virtual machine to create

  5. Under Assign Memory, assign the desired memory to the virtual machine. Then select Next >.

    New Virtual Machine wizard, Assign Memory

  6. Under Configure Networking, enter your network configuration. Then select Next >.

    New Virtual Machine wizard, Configure Networking

  7. Under Connect Virtual Hard Disk, select Use an existing virtual hard disk and browse to the fixed VHD you created in the previous procedure. Then select Next >.

    New Virtual Machine wizard, Select an existing virtual hard disk as the source

  8. Review the summary, and select Finish to create the virtual machine.

Mount ISO image on DVD drive of VM

After creating the new virtual machine, follow these steps to mount your ISO image on the DVD drive of the virtual machine:

  1. In Hyper-V Manager, select the VM you created, and then select Settings.

    In Hyper-V Manager, open Settings for your virtual machine

  2. Under BIOS, ensure that CD is at the top of the Startup order list.

    In BIOS settings, the first item under Startup order should be CD

  3. Under DVD Drive, select Image file, and browse to your ISO image.

    In DVD drive settings, select the image file for your VHD

  4. Select OK to save your VM settings.

Start VM, and complete OS installation

To finish building your virtual machine, you need to start the virtual machine and walk through the operating system installation.

[!INCLUDE Connect to Hyper-V VM]

Note

If you installed the Windows Server 2019 Standard operating system on your virtual machine, you must change the BIOS setting to IDE before you generalize the VHD.

Generalize the VHD

Use the sysprep utility to generalize the VHD.

  1. If you're generalizing a Windows Server 2019 Standard VM, before you generalize the VHD, make IDE the first BIOS setting for the virtual machine.

    1. In Hyper-V Manager, select the VM, and then select Settings.

      Screenshot showing how to open Settings for a selected VM in Hyper-V Manager

    2. Under BIOS, ensure that IDE is at the top of the Startup order list. Then select OK to save the setting.

      Screenshot showing IDE at top of startup order in BIOS settings for a VM in Hyper-V Manager

  2. Inside the VM, open a command prompt.

  3. Run the following command to generalize the VHD.

    c:\windows\system32\sysprep\sysprep.exe /oobe /generalize /shutdown /mode:vm

    For details, see Sysprep (system preparation) overview.

  4. After the command is complete, the VM will shut down. Do not restart the VM.

Your VHD can now be used to create a generalized image to use on Azure Stack Edge Pro GPU.

Upload generalized VHD to Azure Blob storage

[!INCLUDE Upload VHD to Blob storage]

Next steps