SCSI rocks. Disagree with me and I'll persuade you otherwise... hard drives can do a lot of damage when thrown, you know.

Seriously though, the best ATA and SATA hard drives are quite simply nothing compared to what you can get with SCSI. Drives are faster and more reliable, although capacity tends to be less and cost is... well cost accurately represents the increase in performance, let's say!

GD Hardware take a look at a 10krpm 300GB Seagate and a 15krpm 150GB Seagate.
Yeah, we know, it’s not secret we really have an adoration of Seagate and its hard drives. What’s not to like about a company that pushes technology into the mainstream really fast? Or that continues making strides in the SCSI market long after most folks forgot what SCSI even stand for? They power many of our desktops here at GD, power our servers and have always been given great support from a company that so many of its competitors want to be like – Seagate Technologies.
[The review]