I have bought a Sun DWIS/S card to drop in an old SPARCstation and hopefully talk to some differential SCSI drives. What I can't confirm is which kind of differential SCSI the card supports. I'm guessing that the absense of any information means that it's HVD (which is not what I need right now). The SunSolve page on the controller is at: http://sunsolve.sun.com/handbook_pub/Devices/SCSI/SCSI_DWIS_S.html ...to remove any ambiguity about what card I have coming. Thanks for any illumination,