Seagate ST9750422AS, ST9750424AS, ST9750423ASG Serial ATA Sata interface, Hot-Plug compatibility

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5.0Serial ATA (SATA) interface

These drives use the industry-standard Serial ATA interface that supports FIS data transfers. It supports ATA programmed input/output (PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–6. The drive also supports the use of the IORDY signal to provide reliable high-speed data transfers.

For detailed information about the Serial ATA interface, refer to the “Serial ATA: High Speed Serialized AT Attachment” specification.

5.1Hot-Plug compatibility

Momentus drives incorporate connectors which enable you to hot plug these drives in accordance with the Serial ATA: High Speed Serialized AT Attachment specification revision 2.0. This specification can be down- loaded from http://www.serialata.org. This device requires a COMRESET from the host after a hotplug event.

22	Momentus Product Manual, Rev. C

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Contents Momentus Standard models Free-fall sensor modelsRevision history Revision Date Sheets affected or commentsContents Momentus Product Manual, Rev. C List of Figures Page Seagate Technology support services Seagate Online Support and ServicesIntroduction Standard models Free Fall Protection modelsAbout the Serial ATA interface Specification summary table Drive specificationsDrive specifications for 750, 640 and 500 GB models Altitude, nonoperating Default logical geometry LBA modeFormatted capacity Physical organizationDrive specification Physical characteristicsRecording and interface technology Seek time Start/stop timesTypical seek times Typical seek times ms ReadPower specifications Typical current profile Conducted noise Voltage tolerancePower-management modes Power management modesActive mode Idle modeEnvironmental specifications Shock Operating shockNonoperating shock VibrationDrive A-weighted Sound Power Levels SWL, BA AcousticsElectromagnetic immunity Test for Prominent Discrete Tones PDTsFree Fall Protection feature Safety certificationReliability Agency certificationAustralian C-Tick N176 Korean RRLFCC verification Environmental protection Corrosive environmentEuropean Union Restriction of Hazardous Substances RoHS China Restriction of Hazardous Substances RoHS DirectiveConfiguring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions-top, side and end view Drive mountingSerial ATA Sata interface Hot-Plug compatibilitySerial ATA device plug connector pin definitions Serial ATA connector pin definitionsSignal Pin Function DefinitionSupported ATA commands Command name Command code in hex ATA-standard commandsCommand name Command code in hex ATA-standard security commandsIdentify Device command Word Description ValueXxxxH Fffeh Description if bit is set to Bit Set Features command Set Features command valuesA.R.T. commands 3 S.M.A.R.T. commandsCode in features register A.R.T. command 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.