@stopthegop
Any scsi controller can talk to these drives; the problem is the entire bus will automatically synchronize down to the speed of the slowest device on the bus. If the controller itself is the slowest device, then guess what?? Everything goes that speed. With scsi, its "follow the slow-poke". 
This is nonsense. SCSI does not slow down to the speed of the slowest device in the bus.
The SCSI controller naturally sets limit to maximum possible speed, however. You can't go faster than the controller maximum speed.
