The interest rate of your own computer bus which of one's pushes will be more or less similar, otherwise you possess a bottleneck in your system
disk!cabling I do not intend to make too many comments on hardware but I feel I should make a little note on cabling. At todays high speeds one should think of the cable more of a an RF device with its inherent demands on impedance matching. If you do not take your precautions you will get a much reduced reliability or total failure. Some SCSI host adapters are more sensitive to this than others. Shielded cables are of course better than unshielded but the price is much higher. For Fast-ATA and Ultra-ATA, the maximum cable length is specified as 45cm (18").