Powershell - Unmount VHD

unmount-vhd.ps1

# Escalate script if not run as administrator
If (-NOT ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator))
{
  # Relaunch as an elevated process:
  Start-Process powershell.exe "-File",('"{0}"' -f $MyInvocation.MyCommand.Path) -Verb RunAs
  exit
}

# Unmount vhd file
# Use the following path if the vhd file is in the same directory as this script:
# $path = Join-Path $PSScriptRoot my.vhd
$path = "C:\path\to\my.vhd"

## Hyper-V Method
# Use this if you have Hyper-V installed
# Dismount-VHD -path $path

## Diskpart Method
# Use this if you don't want to install Hyper-V
$results = @(
    "select vdisk file=$path",
    "detach vdisk"
) | diskpart

# References for Diskpart method:
# https://www.top-password.com/blog/mount-and-unmount-vhd-vhdx-from-command-line/