Parallel vs Serial speed (was: IDE, SATA, RAID0, RAID4, and RAID5)

[David Kramer]

markw at mohawksoft.com wrote:

> In the above examples, we see that the drives perform similarly, but that
> the SATA interface gives an advantage in transfer speeds, but not the
> 100mb/s vs 300mb/s advertised difference.

Here's something I don't understand.  My gut tells me that a parallel
interface, which sends all the bits at once, should be several times
faster than a serial interface, which must send one bit at a time.  So
how is SATA faster than IDE?

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