8th nerve, thanks for the link. More stuff for me to research. However, maybe someone can please support 8th nerve on this if I am wrong, but notebook drives, I think, are more quiet than ATA drives? Supposedly, the good notebook drives are suspended to prevent head damage during impact and would alleviate vibration and harmonic resonance. I THINK this would contibute to less jitter. Just deducing... again
On another note, with RAID, I thought an array of notebook discs even with their low RPM can be configured to be faster or atleast comporably as fast as ultra ata. Plus, they generate a lot less heat, so you can pack in more drives per enclosure. Oh, higher RPM inherently generate more heat and harmonic resonance as well.
I was part of a marketing team for a 3rd party fujitsu 2.5" drive storage enclosure solution when serial ata was first coming out. I sorta slept through the meetings though... my GAWD Fujitsu engineers are the most boring (*#%#$.