Recording to a 2nd drive?

[Acemore]

Achieving good quality

One thing that is good to get to improve performance and quality is to get a second hardrive it doesn't have to be somthing real big but it will put less stress on the computer therefor helping in both quality of the movie and performance.

This is taken from the Fraps performance sticky thread, and I was wondering a bit more about the specifics here.

Is a different partition of the same drive enough?

Or does it mean a different drive altogether in raid configuration with the primary drive?

How does this improve performance?

By how much does it improve?


I currently have a Western Digital Raptor 150GB SATA 16MB 10000RPM. Any answers to this would be much appreciated, as I'm considering to buy a second drive just like it for this.