Seagate ST9500424AS, ST9750422AS, ST9750424AS, ST9750423ASG, ST9750420ASG, ST9640422AS Tpi

Page 41

Read Verify Sectors Extended 24 Read Verify Sectors without Retries 24 Read/write heads 6

Read/write power 4

read/write power and current 9 Recording density 4, 7 Recording method 7 Recording technology 7 Relative humidity 5, 13 Reliability 16

resistance 11 Retries 24 RF 15 RoHS 18 RPM 4 RRL 17

S

S.M.A.R.T. 25

S.M.A.R.T. implementation 24 Safety certification 16 SATA 7, 22

screws 14, 21 sector 6 sectors 6 Sectors per track 6

Security Disable Password 25 Security Erase Prepare 25 Security Erase Unit 25 Security Freeze Lock 25 Security Set Password 25 Security Unlock 25

Seek 24 seek mode 9 Seek power 4 Seek time 8 seek time 4 Seeking 9

Self refresh, low power 12 Serial ATA 7

Serial ATA (SATA) interface 22 serial ATA ports 3

servo electronics 9 Set Features 24 Set Max Address 24 Set Multiple Mode 24 Shock 14

Shock, nonoperating 5 Shock, operating 5 single-track seeks 8 Sleep 9, 25

Sleep mode 5, 12 sound power 5 Specification summary table 4 Spindle speed 4, 7

Spinup 9 spinup power 9 Standby 9, 25 Standby Immediate 25 Standby mode 5, 9, 12 Standby to Ready 8 Standby to ready 4 Start/stop times 8 Startup current 4 static-discharge 19 support services 1 Surge immunity 15

T

technical support services 1 temperature 5, 8, 13 Temperature gradient 5, 13 timers 12

TPI 4

Track density 4, 7 Track-to-track seek time 4, 8 TUV North America 16

U

UL 1950 16

V

Vibration 14

Vibration, nonoperating 5 Vibration, operating 5 Voltage dips, interrupts 15 Voltage tolerance 5, 11

W

Warranty 16 Weight 4 weight 7

Wet bulb temperature 5, 13 Width 4

width 7

Write Buffer 25

Write DMA 25

Write DMA Extended 25 Write Long with Retries 25 Write Long without Retries 25 Write Multiple 25

Write Sectors 25

Momentus Product Manual, Rev. C

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Contents Standard models Free-fall sensor models MomentusRevision Date Sheets affected or comments Revision historyContents Momentus Product Manual, Rev. C List of Figures Page Seagate Online Support and Services Seagate Technology support servicesStandard models Free Fall Protection models IntroductionAbout the Serial ATA interface Drive specifications for 750, 640 and 500 GB models Drive specificationsSpecification summary table Altitude, nonoperating LBA mode Default logical geometryFormatted capacity Physical organizationRecording and interface technology Physical characteristicsDrive specification Start/stop times Seek timeTypical seek times Typical seek times ms ReadPower specifications Typical current profile Voltage tolerance Conducted noisePower management modes Power-management modesActive mode Idle modeEnvironmental specifications Operating shock ShockNonoperating shock VibrationAcoustics Drive A-weighted Sound Power Levels SWL, BAElectromagnetic immunity Test for Prominent Discrete Tones PDTsSafety certification Free Fall Protection featureReliability Agency certificationFCC verification Korean RRLAustralian C-Tick N176 Corrosive environment Environmental protectionEuropean Union Restriction of Hazardous Substances RoHS China Restriction of Hazardous Substances RoHS DirectiveHandling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions-top, side and end viewHot-Plug compatibility Serial ATA Sata interfaceSerial ATA connector pin definitions Serial ATA device plug connector pin definitionsSignal Pin Function DefinitionCommand name Command code in hex ATA-standard commands Supported ATA commandsATA-standard security commands Command name Command code in hexWord Description Value Identify Device commandXxxxH Fffeh Description if bit is set to Bit Set Features command values Set Features commandCode in features register A.R.T. command 3 S.M.A.R.T. commandsA.R.T. commands Momentus Product Manual, Rev. C Index ITE TPI Momentus Product Manual, Rev. C Page Seagate Technology LLC
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ST9500428AS, ST9640422AS, ST9750423ASG, ST9750420AS, ST9750420ASG specifications

The Seagate ST9750422AS, ST9750423AS, ST9500423ASG, ST9640423ASG, and ST9500423AS are part of Seagate's popular lineup of SATA hard drives designed for consumer and enterprise applications. These drives are recognized for their reliability, performance, and advanced technologies, making them suitable for a variety of storage needs.

The ST9750422AS and ST9750423AS models are 7200 RPM drives with a storage capacity of 750 GB, while the ST9500423ASG and ST9640423ASG offer different capacities and characteristics tailored for specific uses. The ST9500423ASG typically features a 500 GB capacity, while the ST9640423ASG is often found with 640 GB of storage space. These drives support the Serial ATA interface, ensuring high-speed data transfer rates and compatibility with a broad range of host systems.

All drives in this series feature a robust 32 MB cache that enhances performance by allowing faster access to frequently used data. This cache is critical, especially for read/write operations that require rapid data retrieval, making these models well-suited for tasks ranging from simple home computing to more intensive applications such as gaming and multimedia editing.

The ST9750422AS and ST9750423AS models are built with technologies such as Advanced Format, which improves storage capacity and enhances error correction. Additionally, these drives employ Seagate's PowerBalance and PowerFin technologies, enabling efficient power management without compromising performance.

Reliability is a core characteristic of the Seagate ST9XXX series, featuring a mean time between failures (MTBF) of over a million hours, which translates to increased system uptime and reduced potential for data loss. The drives also include features such as Native Command Queuing (NCQ), which optimizes the processing of multiple read/write commands, further boosting performance during heavy workloads.

In conclusion, the Seagate ST9750422AS, ST9750423AS, ST9500423ASG, ST9640423ASG, and ST9500423AS hard drives represent a blend of speed, reliability, and advanced technology, making them an excellent choice for users looking for dependable storage solutions. Whether for a home PC or an enterprise server, these drives continue to deliver outstanding performance and value in a competitive market.
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