Seagate ST9640320AS, ST9640322AS manual Introduction, 4K byte/sector models, Byte/sector models

2.0Introduction

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

4K byte/sector models

• ST9640322AS • ST9400321AS • ST9320312AS

512 byte/sector models

•	ST9640320AS	•	ST9320310AS	•	ST9160316AS
•	ST9500320AS	•	ST9250310AS	•

These drives provide the following key features:

•5400-RPM spindle speed.

•8-MB buffer.

•Quiet operation. Fluid Dynamic Bearing (FDB) motor.

•High instantaneous (burst) data-transfer rates (up to 3.0 Gb/s).

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

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

•Native Command Queuing (NCQ) with command ordering.

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

•1000 Gs nonoperating shock and 350 Gs of operating shock.

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

•The 3D Defense System™, which includes Drive Defense, Data Defense and Diagnostic Defense, offers the industry’s most comprehensive protection for disc drives.

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

•Support for Read Multiple and Write Multiple commands.

2 Momentus Product Manual, Rev. D