Q. How can I mount a Virtual Hard Disk (VHD) file on my Hyper-V server from PowerShell?

A. Mounting a VHD with Windows 2008 R2 is easy using Disk Manager and the command line diskpart utility, but you can also use PowerShell with Msvm_ImageManagementService, as shown here.

$VHDService = get-wmiobject -class "Msvm_ImageManagementService" -namespace "root\virtualization" -computername "."
$VHDService.Mount("<path to vhd file>")

You can unmount using the $VHDService.Unmount command in place of $VHDService.Mount.