HDD-s on Mac Pro RAID linked, more power?

[Andrei Nemo]

Hello to all!
I am planning on upgrading HDD speed on my MacPro 2.8Ghz quad core. The extra power is used for writing incompressible data like PSD-s and Tiff-s.

After reading tons of articles on SSD drives I have reached the conclusion that the speed Vs. cost it's not yet a good deal, when it comes to writing incompressible data.

Now I have got to the final solution, of using 7200rpm HDD-s RAID linked.
From what I have read the best HDD-s for RAID performance are WD Re4 enterprise. Correct?
(read about the apple raid card and it's not worth the money)

The big noob questions are:
1. How do I link the HDD-s in RAID so that I gain more power?
2. The more HDD-s RAID linked, the more power?( Was thinking of 4x500gb hdd-s)?

Thank you!

 

[Lance-AR]

Assuming you are looking to fill 4 drive bays but don't need much storage. 4 drives in a RAID 0 (best performance) scares me. Are you looking at RAID 10? Higher capacity drives give better performance due to more denser platters. Another option would be 3 drives in a RAID 0 with a larger drive for time machine. How comfortable are you with downtime?