@Inertia and rdgrimes
Well, Buckaroos, as my ol' Pappy used to say: "You can lead a horse to water, but you..............................."
So gather 'round the campfire and maybe we can separate some mythology and anecdotal observations from good ol' fashioned book larnin'.
It has to do with the open systems architecture as defined in the IEEE Specs/Standards. Once these have been voted on and become official, everybody has to design hardware and software that is in compliance with them or their designs just won't work. It's just that simple - that's all there is to it. It doesn't matter if the motherboard with the IDE channels/connectors and the ATA/ATAPI devices are 5 years old or new this year. The standards specify one way data transfer only. (Now, this is different from SCSI, which does have two way data transfer.) What else can I say?
Well, Buckaroos, still not good enough? So I just ran an actual comparison test. Transferring 936MB of photos from a freshly defragged partition on my primary IDE channel HDD to an empty partition on a secondary IDE channel hard drive. Then transferring from the latter partition to another empty partition on the secondary channel.
............and, the envelope please! 1min 45sec interchannel; 3min 00sec intrachannel. I accept the fact that my shoot from the hip 2 to 1 estimate is somewhat overstated.
Ready for that drink yet, Buckaroos?
I take no offense that disagreement was expressed with my postings in this issue. However, I am gravely dissapointed in the attitude expressed concerning the veracity of Robert Bruce Thompson's book (my referenced source). That disdainful attitude does not convey an overwhelming sense of intellectualism.
About the book? I bought the original edition and was impressed enought that I bought the second edition last summer. The third edition will be available soon and I'll order that one too, shortly. Why, one might ask? As you may have noticed, I don't know everything and I've got to deal with that issue next.