Maxtor STM3250824AS, STM3160815AS, STM3160215AS, STM3250310AS manual 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 necessary to set any jump- ers 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 www.serialata.org.

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DiamondMax 21 Serial ATA Product Manual, Rev. C

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Contents DiamondMax Revision status summary sheet Contents DiamondMax 21 Serial ATA Product Manual, Rev. C List of Figures Typical 5V startup and operation current profilePage Introduction About the Serial ATA interface Drive specifications Specification summary tablesDrive specifications summary for 500 Gbyte models Drive specification STM3500630ASYes Drive specifications summary for 320 Gbyte models Drive specification STM3320820AS STM3320620ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for 250 Gbyte models Drive specification STM3250824AS STM3250820AS STM3250310ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for the 160 Gbyte models Drive specification STM3160815AS STM3160215ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for the 80 Gbyte model Drive specification STM380815AS STM380215ASYears on distribution units Drive specifications summary for the 40 Gbyte model Drive specification STM340215ASDiamondMax 21 Serial ATA Product Manual, Rev. C Default logical geometry LBA modeFormatted capacity Cylinders Read/write heads Sectors per track 16,383STM3250310AS STM380815AS, STM380215AS and STM340215AS Recording and interface technologySTM3160815AS, STM3160215AS Physical characteristics Power specifications Seek timeStart/stop times STM3250820AS 500-320 GB STM3250824AS STM3250310AS 160 40 GBPower consumption Spinup powerIdle mode power Seek modeVoltage tolerance Typical current profilesConducted noise Power-management modes Active modeIdle mode Sleep modeEnvironmental specifications Nonoperating shock VibrationOperating vibration Nonoperating vibrationAcoustics Electromagnetic immunityFluid Dynamic Bearing FDB motor acoustics Radio frequency environmentsSafety certification ReliabilityAgency certification Electromagnetic compatibilityFCC verification Korean RRLAustralian C-Tick N176 China Restriction of Hazardous Substances RoHS Directive Environmental protectionCorrosive environment Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsDrive mounting Drive dimensions for 40-160 GB and STM3250310AS models 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 100 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 Maxtor support services DiamondMax 21 Serial ATA Product Manual, Rev. C Index ITE Page DiamondMax 21 Serial ATA Product Manual, Rev. C Page Seagate Technology LLC
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