Seagate ST3120211AS, ST3120811AS, ST3160211AS, ST3160811AS manual About the Serial ATA interface

Page 8

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.

•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 www.serialata.org.

2

Barracuda 7200.9 Serial ATA Product Manual, Rev. C

Page 7 Page 9
Image 8
Page 7 Page 9
Contents Barracuda 7200.9 Serial ATA Page Contents Barracuda 7200.9 Serial ATA Product Manual, Rev. C List of Figures Page Introduction About the Serial ATA interface Drive specifications Specification summary tablesDrive specifications summary for 160 Gbyte models Drive specification ST3160811AS ST3160211ASBarracuda 7200.9 Serial ATA Product Manual, Rev. C Drive specifications summary for 120 Gbyte models Drive specification ST3120811AS ST3120211ASBarracuda 7200.9 Serial ATA Product Manual, Rev. C Drive specifications summary for 80 and 40 Gbyte models Drive specification ST380811AS ST380211AS ST340211ASBarracuda 7200.9 Serial ATA Product Manual, Rev. C Default logical geometry LBA modeFormatted capacity Cylinders Read/write heads Sectors per track 16,383Physical characteristics Recording and interface technologyTypical seek times msec Read Write Seek timeStart/stop times Power specifications Voltage tolerance Typical current profilesConducted noise Power-management modes Active modeIdle mode Sleep modeEnvironmental specifications Acoustics VibrationOperating vibration Nonoperating vibrationElectromagnetic immunity ReliabilityRadio frequency environments Test Description Performance level Reference standardSafety certification Agency certificationElectromagnetic compatibility Korean RRLEuropean Union Restriction of Hazardous Substances RoHS Environmental protectionFCC verification Corrosive environment Barracuda 7200.9 Serial ATA Product Manual, Rev. C Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions-top, side and end view Drive mountingBarracuda 7200.9 Serial ATA Product Manual, Rev. C Serial ATA Sata interface Hot-Plug compatibilitySerial ATA device plug connector pin definitions Serial ATA connector pin definitionsSignal Pin Function DefinitionCommand name Command code in hex Supported ATA commandsSupported ATA commands F4H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordSet Features command Set Features command valuesCode in features register A.R.T. command 3 S.M.A.R.T. commandsM.A.R.T. commands Barracuda 7200.9 Serial ATA Product Manual, Rev. C Seagate Technology support services InternetPresales Support Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index RRL Sata Barracuda 7200.9 Serial ATA Product Manual, Rev. C Page Seagate Technology LLC
Top Page Image Contents