Scott Lowe of writes :

In my last article in this series, I explained the differences between Parallel ATA and Serial ATA 1.0. In this article, I will expand this coverage to include the relatively new SATA II standard. SATA II is the evolutionary next-step in the development of Serial ATA, and boasts significant performance and feature improvements over SATA 1.0, making it more suitable for enterprise-level applications. Let’s take a look under the hood at this new technology…

While Serial ATA 1.0 helped pave the way for a transition from parallel to serial data transfer in the IDE disk world, Serial ATA IO takes the standard to a whole new level by adding capabilities including Native Command Queuing, port multiplication, hot plugging, external enclosures, port selection (and others described below), and by increasing the potential speed of the interface to 3GB/s. That’s the good part. The bad part: Many of the new enhancements are only optional, but the SATA label can still be used. Therefore, if you are buying a SATA-IO disk or controller and specifically need one of the new features, make sure you carefully read the fine print and all of the specifications for both your controllers and disks. For example, your new disk may say SATA-IO and run at the newer speed, but may only support two of the SATA-IO features.

[Continue reading Get the pros and cons of SATA II (SATA-IO)]

[tags]sata,disk,drive,sata ii,s-ata,s-ata ii,sata-io,p-ata,ide,hard,native command queuing,port multipliers,asynchronous notification,clickconnect,esata,hot plug,link power management,staggered spin-up,xata[/tags]