1) Why isn't there any absolute measuring unit for the processing power of a cpu? For example, I once thought that Hz was such a unit, but newprocessors with lower Hz than the older ones are faster (have more processing power). Why isn't "FLOPS" used (like in the supercomputers) since it's probably more useful?
2) In what way are the SCSI HDDs different from the common ones (IDE, SATA, USB). I checked some of them at a local hardware shop and the only difference I see is that they have immense rotating speed (like 15000 RPM) but is it just that?