Seagate ST4000 ユーザーズマニュアル
Seagate Desktop HDD Product Manual, Rev. A
5
1.0
Introduction
This manual describes the functional, mechanical and interface specifications for the following: Seagate
®
Desktop HDD model
drives:
These drives provide the following key features:
•
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 Queuing 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.
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.
1.1
About the SATA interface
The Serial ATA (SATA) interface provides several advantages over the traditional (parallel) ATA interface. The primary
advantages include:
advantages include:
•
Easy installation and configuration with true plug-and-play connectivity. It is not necessary to set any jumpers or other
configuration options.
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 users to install a SATA host adapter and SATA disk drive in the current system and expect all of the 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.
The SATA host adapter contains a set of registers that shadow the contents of the traditional device registers, referred to as the
Shadow Register Block. All SATA devices behave like Device 0 devices. For additional information about how SATA emulates
parallel ATA, refer to the Serial ATA International Organization: Serial ATA Revision 3.2. The specification can be downloaded
from
allow users to install a SATA host adapter and SATA disk drive in the current system and expect all of the 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.
The SATA host adapter contains a set of registers that shadow the contents of the traditional device registers, referred to as the
Shadow Register Block. All SATA devices behave like Device 0 devices. For additional information about how SATA emulates
parallel ATA, refer to the Serial ATA International Organization: Serial ATA Revision 3.2. The specification can be downloaded
from
.
ST6000DM001
ST5000DM002
ST4000DM000
Note
The host adapter may, optionally, emulate a master/slave environment to host software where two devices on
separate SATA ports are represented to host software as a Device 0 (master) and Device 1 (slave) accessed at
the same set of host bus addresses. A host adapter that emulates a master/slave environment manages two
sets of shadow registers. This is not a typical SATA environment.
separate SATA ports are represented to host software as a Device 0 (master) and Device 1 (slave) accessed at
the same set of host bus addresses. A host adapter that emulates a master/slave environment manages two
sets of shadow registers. This is not a typical SATA environment.