Q: 31

DRAG DROP You have a server named Server 1 that runs Windows Server and has the Hyper-V server role installed. Server1 hosts a virtual machine named VM1. Server1 has an NV Me storage device that is assigned to VM1 by using Discrete Device Assignment. You need to make the device available to the host. Which four actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.

Drag & Drop

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From VM1, disable the device by using Device Manager.
From Server1, stop VM1.
From Server1, run the Remove-VMAssignableDevice cmdlet.
From Server1, run the Mount-VMHostAssignableDevice cmdlet.
From Server1, enable the device by using Device Manager.

Correct Answer:

Answer Area Target 1: B. From Server1, stop VM1. Target 2: C. From Server1, run the Remove-VMAssignableDevice cmdlet. Target 3: D. From Server1, run the Mount-VMHostAssignableDevice cmdlet. Target 4: E. From Server1, enable the device by using Device Manager.

Explanation

To return a device passed through via Discrete Device Assignment (DDA) back to the host, you must follow this specific sequence:

Stop VM1: The virtual machine must be turned off to modify its hardware configuration and release the lock on the physical device.
Remove-VMAssignableDevice: This PowerShell cmdlet removes the device assignment from the virtual machine's configuration.
Mount-VMHostAssignableDevice: This cmdlet returns the device to the host operating system. During DDA setup, the device is "dismounted" (hidden) from the host; this reverses that step.
Enable the device: During the initial DDA setup, the device was disabled in the host's Device Manager to prevent the host OS from interfering. Therefore, you must re-enable it to make it usable again on Server1.

References

Microsoft Learn: Deploy NVMe storage devices using Discrete Device Assignment

Section: "Removing a device and returning it to the host"

Quote: "If you want to return the device back to its original state, you will need to stop the VM and issue the following: Remove-VMAssignableDevice ... Mount-VMHostAssignableDevice ... You can then re-enable the device in device manager..."

URL: https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/deploy/deploying-storage-devices-using-dda#removing-a-device-and-returning-it-to-the-host

Microsoft Learn: Deploy graphics devices by using Discrete Device Assignment

Section: "Remove a device and return it to the host"

URL: https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/deploy/deploying-graphics-devices-using-dda#remove-a-device-and-return-it-to-the-host

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