Barracuda 80GB 3.5" SATA II
With a Serial ATA interface, each disc drive has its own cable that connects directly to a Serial ATA host adapter or a Serial ATA port on your motherboard. Unlike Parallel ATA, there is no master-slave relationship between drives that use a Serial ATA interface.
You can use a Serial ATA drive in the same system with Parallel ATA drives as long as both interfaces are supported on the motherboard or with a host adapter. This makes it easy to add Serial ATA capability to your existing system without removing existing Parallel ATA disc drives.
Seagate Desktop HDD 80GB 3.5" SATA II. Hard drive size: 3.5", Hard drive capacity: 80 GB, Hard drive speed: 7200 RPM, Hard drive interface: Serial ATA II, Device type: HDD, Drive device, buffer size: 2 MB