Wrong, or half right, which is sometimes worse than just wrong. The main reason for using SCSI over IDE technology is simultaneous command queueing. Ever wonder why a SCSI drive makes a machine, server or workstation feel so much faster?

It's because even workstations do simultaneous read requests. SCSI has this great feature that basically when you request data from 3 different sections of the drive, it reprioritizes on the fly, picking up everything you requested along the way to the furthest request. That way, fewer strokes get you more data. It's probably a good part of the reason the MTBF is so much better.

An IDE drive deals with it's queue in a FIFO manner. Each request gets processed sequentially, so an SATA Raid is going to be basically useless in terms of performance, and host utilization is only the tip of the iceberg.

There's at least one good reason real geeks use SCSI. It's also a big part of why IDE-based Mac's 'feel' so much slower.

SCSI rules.

Neeeeeeext!