Dear Readers,

Just recently, I came across a couple of comparative tests regarding fast Hard Drives.

And I was wondering, if anyone with a relative experience on DAW Recording, could tell me which Hard Drive Specs to look for, when considering buying Hard Drives to build a DAW System.
In other words: Which Hard disk performance specs are the most important to us "music guys", to perform better on a DAW?

More case-specifically, I'm Using Nuendo 3 and Pro Tools software, and I'm Trying to Choose the best performing SATA Hard Drives for:

1) System Disk
2) (3X) VST Instruments Disks
3) (2X) SATA RAID Audio Recording/Playback Disks

Which of the HD Specs (like Average Random Access Time Read/Write, Maximum/Minimum Trensfer Rates etc., etc.), are the most important to look for, in each of the above 3 uses?

I open-call anybody who might interestingly concern, and I appreciate your input!