Please explain SCSI to me

[wizardmaxx]

Ok so far I've determined that a 80pin HDD can be used on a 68pin controller card with either a backplane or adapter.

Next thing is the U160 vs U320 issue. Will a U320 80pin hdd run on a U160 controller card or does it have to be U160 with U160 and U320 with U320.

 

[wizardmaxx]

So the difference is really the bandwidth and thats it ?

Also what benefit would it be to get a U160 controller that can take extra memory(ie 128mb upgrade)

Thanks RPStewart. Now help me take better photos. Bought my first DSLR two weeks ago

 

[wizardmaxx]

OK making more sense now. So if i went for something like the Adaptec 39320 pci-x it would work in my DS4 as I have a spare x4 slot ?