I'm trying to get a pass through drive to work in hyper v. I took the physical device off line, added the physical drive through the SCSI controller. I don't see the drive in disk manager, etc, so I checked the device manager and found, under other devices, a SCSI disk drive thats showing "working properly" but has the ? driver. Integration services are installed. Both host and vm are server 08 R2, fully updated. Any ideas on how to get the scsi pass through to mount? It is not a boot drive, just extra storage.