Powershell- Associate Mount Point to Physical Disk

I need to be able to associate mount points (Get-WmiObject -Class Win32_MountPoint) with the physical drive on which it resides.

Scenario: I have physical disks (SAN LUNs) mounted as folders on an E: drive (also a SAN LUN) of a server.  I need to be able to, via a PowerShell script, associate the "folder" name to the physical disk (i.e., Harddisk4 or PhysicalDrive4).

I can get Mount Point associated with the Volume, etc., but can't make the link to the physical disk.

Any help is appreciated.