Originally Posted by HaydnH
A bit of a side question, but what are you using the drives for? Would it be worth considering a raid controller instead of just a sata controller?
That's really the key question. Buying performance you don't use is not worthwhile either.
My use case is to mount more drives to allow common mount points between my Fedora and Debian dual boots. I share the development and document drives across kernel images which are on separate drives. In addition I have 2 x 2TB drives for bulk storage.
In my use case I'm not looking to drive high MB/sec volumes to the drives. I'm looking to share multiple data stores between two physically separate kernel installs.
The raid controller question depends on whether the data ports can be accessed simultaneously. If they can, then you could use software raid to improve performance by striping the data across multiple drives.
Hardware raid can also deliver the performance advantages of striping your data, but there is the caveat that the data retrieval may only be possible thru that particular model of adapter card. ( buy a spare if you are as paranoid as I am )