list_harddrive_volumes.ps1

$DynAssembly = New-Object System.Reflection.AssemblyName('SysUtils')
$AssemblyBuilder = [AppDomain]::CurrentDomain.DefineDynamicAssembly($DynAssembly, [Reflection.Emit.AssemblyBuilderAccess]::Run)
$ModuleBuilder = $AssemblyBuilder.DefineDynamicModule('SysUtils', $False)
 
$TypeBuilder = $ModuleBuilder.DefineType('Kernel32', 'Public, Class')
$PInvokeMethod = $TypeBuilder.DefinePInvokeMethod('QueryDosDevice', 'kernel32.dll', ([Reflection.MethodAttributes]::Public -bor [Reflection.MethodAttributes]::Static), [Reflection.CallingConventions]::Standard, [UInt32], [Type[]]@([String], [Text.StringBuilder], [UInt32]), [Runtime.InteropServices.CallingConvention]::Winapi, [Runtime.InteropServices.CharSet]::Auto)
$DllImportConstructor = [Runtime.InteropServices.DllImportAttribute].GetConstructor(@([String]))
$SetLastError = [Runtime.InteropServices.DllImportAttribute].GetField('SetLastError')
$SetLastErrorCustomAttribute = New-Object Reflection.Emit.CustomAttributeBuilder($DllImportConstructor, @('kernel32.dll'), [Reflection.FieldInfo[]]@($SetLastError), @($true))
$PInvokeMethod.SetCustomAttribute($SetLastErrorCustomAttribute)
$Kernel32 = $TypeBuilder.CreateType()
 
$Max = 65536
$StringBuilder = New-Object System.Text.StringBuilder($Max)
 
Get-WmiObject Win32_Volume | ? { $_.DriveLetter } | % {
	$ReturnLength = $Kernel32::QueryDosDevice($_.DriveLetter, $StringBuilder, $Max)
	
	if ($ReturnLength)
	{
		$DriveMapping = @{
			DriveLetter = $_.DriveLetter
			DevicePath = $StringBuilder.ToString()
		}
		
		New-Object PSObject -Property $DriveMapping
	}
}