Seagate ST750DM003, STBD3000100, STBD2000101, ST1000DM003 Introduction, About the Sata interface

1.0 Introduction

This manual describes the functional, mechanical and interface specifications for the following Seagate Barracuda® model drives:

ST3000DM001	ST2000DM001	ST1500DM003	ST1000DM003
ST750DM003	ST500DM002	ST320DM000	ST250DM000

These drives provide the following key features:

•7200 RPM spindle speed.

•High instantaneous (burst) data-transfer rates (up to 600MB per second).

•TGMR recording technology provides the drives with increased areal density.

•State-of-the-art cache and on-the-fly error-correction algorithms.

•Native Command Queueing with command ordering to increase performance in demanding applications.

•Full-track multiple-sector transfer capability without local processor intervention.

•Seagate AcuTrac™ servo technology delivers dependable performance,even with hard drive track widths of only 75 nanometers.

•Seagate OptiCache™ technology boosts overall performance by as much as 45% over the previous generation.

•Seagate SmartAlign™ technology provides a simple, transparent migration to Advanced Format 4K sectors

•Quiet operation.

•Compliant with RoHS requirements in China and Europe.

•SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.

•Support for S.M.A.R.T. drive monitoring and reporting.

•Supports latching SATA cables and connectors.

•Worldwide Name (WWN) capability uniquely identifies the drive.

1.1About the SATA interface

The Serial ATA (SATA) interface provides several advantages over the traditional (parallel) ATA interface. The primary advantages include:

•Easy installation and configuration with true plug-and-play connectivity. It is not necessary to set any jumpers or other configuration options.

•Thinner and more flexible cabling for improved enclosure airflow and ease of installation.

•Scalability to higher performance levels.

In addition, SATA makes the transition from parallel ATA easy by providing legacy software support. SATA was designed to allow you to install a SATA host adapter and SATA disk drive in your current system and expect all of your existing applications to work as normal.

The SATA interface connects each disk drive in a point-to-point configuration with the SATA host adapter. There is no master/slave relationship with SATA devices like there is with parallel ATA. If two drives are attached on one SATA host adapter, the host operating system views the two devices as if they were both “masters” on two separate ports. This essentially means both drives behave as if they are Device 0 (master) devices.

The SATA host adapter and drive share the function of emulating parallel ATA device behavior to provide backward compatibility with existing host systems and software. The Command and Control Block registers, PIO and DMA data transfers, resets, and interrupts are all emulated.

Barracuda SATA Product Manual, Rev. G 9