Seagate ST9500325ASG, ST9320325ASG, ST9250315ASG, ST9160314ASG About the Serial ATA interface

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1.1About 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 normally 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 you to install a Serial ATA host adapter and Serial ATA disc drive in your current system and expect all of your existing applications to work as normal.

The Serial ATA interface connects each disc 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.

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.

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 regis- ters, referred to as the Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For addi- tional information about how Serial ATA emulates parallel ATA, refer to the “Serial ATA: High Speed Serialized AT Attachment” specification. The specification can be downloaded from http://www.serialata.org.

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Momentus 5400.6 SATA Product Manual, Rev. A

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Contents Momentus 5400.6 Sata Page Momentus 5400.6 Sata Product Manual, Rev. a Momentus 5400.6 Sata Product Manual, Rev. a Contents Momentus 5400.6 Sata Product Manual, Rev. a List of Figures Page Introduction About the Serial ATA interface Drive specifications Specification summary tableRead 2.6 watts Write 2.85 watts Formatted capacity Default logical geometryLBA mode Cylinders Read/write heads Sectors per track 16,383Physical organization Physical characteristicsDrive specification Recording and interface technologyTypical seek times Seek timeStart/stop times Seek times msec ReadPower specifications Conducted noise Typical current profileDeferred spinup Voltage toleranceActive mode Power-management modesPower management modes Idle modeEnvironmental specifications Nonoperating shock ShockOperating shock VibrationElectromagnetic immunity Drive A-weighted Sound Power Levels SWL, BAAcoustics Test for Prominent Discrete Tones PDTsReliability Free Fall Protection featureSafety certification Agency certificationAustralian C-Tick N176 Korean RRLFCC verification European Union Restriction of Hazardous Substances RoHS Environmental protectionChina Restriction of Hazardous Substances RoHS Directive Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsDrive mounting Top cover stiffness/deflectionMeasurements shown in are in inches Serial ATA Sata interface Serial ATA connector pin definitionsSignal Segment Pin Function DefinitionPin Function Definition P10 Ground 2nd mate P11 ReservedSupported ATA commands Command name Command code in hex ATA-standard commandsCommand name Command code in hex Momentus 5400.6 Sata Product Manual, Rev. a Identify Device command Word Description ValueXx7FH Description if bit is set to Bit Word Bit WordSet Features command Set Features command valuesAAH A.R.T. commands 3 S.M.A.R.T. commandsCode in features register A.R.T. command Momentus 5400.6 Sata Product Manual, Rev. a Presales Support Seagate Technology support servicesTechnical Support Data Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index ITE Sata Momentus 5400.6 Sata Product Manual, Rev. a Page Seagate Technology LLC
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