I need raw SCSI I/O to be virtualizable in the linux context, so I could run a Windows app (yes it already works in Wine), and have it 'see' a SCSI device as if it were real hardware.

Wines WNASPI32.dll is really just a facade - it doesn't provide actual SCSI services, its just there for SCSI-using apps to think they have ASPI onboard - so for my case I would need to write a shim to pass through SCSI IO requests to a Linux service - or loopback file? - to actually process the requests. I've been meaning to do this for a long time, but if there is some way I can set up a loopback file under Linux to 'pretend' to be a SCSI block device for a Windows app, I'd sure like to know if its possible ..