Assuming you've got a VM configured with the physical disks mapped in as LSI SCSI, these are the registry entries you need to tweak:

REGEDIT4

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LSI_SAS]
"Start"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LSI_SAS2]
"Start"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LSI_SCSI]
"Start"=dword:00000000

YMMV; Basically, just set "Start"=0 to enable boot-time loading for as many LSI/SCSI drivers that might seem necessary. Probably only 1 or 2 of these are essential, I just guessed this set on my first attempt. This will prevent the lovely BSOD STOP 7B errors Windows loves to throw at you when booting the VM.