Seagate Video 2.5 Product Manual, Rev. H
6
1.0
Introduction
This manual describes the functional, mechanical and interface specifications for the following Seagate® Video 2.5 HDD model drives:
These drives provide the following key features:
• 1000 Gs non-operating shock and 400 Gs of operating shock.
• 128MB buffer.
• 5400-RPM spindle speed.
• Best-in-class acoustic performance means virtually silent operation.
• Built-in error recovery for non-stop video streaming.
• Enhanced caching capabilities enable superior video recording quality.
• Full-track multiple-sector transfer capability without local processor intervention.
• High instantaneous (burst) data-transfer rates (up to 6Gb/s).
• MTC Technology
TM
, proprietary data flow management.
• Native Command Queuing with command ordering to increase performance in demanding applications.
• Performance-tuned for seamless video applications.
• Reliability for 24×7 video applications.
• SeaTools
TM
diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• Shingled magnetic recording with perpendicular magnetic recording heads/media.
• Spread Spectrum Clocking (SSC) supported and enabled.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Support for Read Multiple and Write Multiple commands.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Supports ATA8 streaming commands.
• Supports power-up in the standby feature.
• Worldwide Name (WWN) capability uniquely identifies the drive.
1.1
About the Serial ATA Interface
The Serial ATA 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, Serial ATA makes the transition from parallel ATA easy by providing legacy software support. Serial ATA was designed to allow users to
install a Serial ATA host adapter and Serial ATA disk drive in the current system and expect all of the existing applications to work as normal.
The Serial ATA interface connects each disk drive in a point-to-point configuration with the Serial ATA host adapter. There is no master/slave
relationship with Serial ATA devices like there is with parallel ATA. If two drives are attached on one Serial ATA 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 Serial ATA 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 Serial ATA host adapter contains a set of registers that shadow the contents of the traditional device registers, referred to as the Shadow
Register Block. All Serial ATA devices behave like Device 0 devices. For additional information about how Serial ATA emulates parallel ATA, refer to
the
Serial ATA International Organization: Serial ATA
(Revision 3.2). The specification can be downloaded from
www.serialata.org
.
Standard models
ST2000VT000
ST1000VT001
ST500VT003
Note
The host adapter may, optionally, emulate a master/slave environment to host software where two devices on separate Serial ATA 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 Serial ATA environment.
