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Product Manual
®
Momentus
7200-RPM
5400-RPM
Standard models Free-fall sensor models
ST9750423AS ST9750423ASG
ST9750422AS ST9750420ASG
ST9750420AS ST9640423ASG
ST9750424AS * ST9500423ASG
ST9640424AS
ST9640423AS
ST9640422AS *
ST9500424AS
ST9500423AS
ST9500428AS *
100627937
Rev. C
January 2011
* specifications for these models are available from Seagate
technical support www.seagate.com/www/en-us/about/contact_us/
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Revision history Revision Date Sheets affected or comments Rev. A 09/15/10 Initial release. Rev. B 10/25/10 fc, 2, 4-9, 13-14, 16 & 26-28. Rev. C 01/28/11 Add Models to cover - ST9750424AS, ST9640422AS, ST9500428AS © 2011 Seagate Technology LLC. All rights reserved. Publication number: 100627937, Rev. C, January 2011 Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Momentus and SeaTools are either tra
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Contents 1.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1 About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .
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ii Momentus Product Manual, Rev. C
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List of Figures Figure 1. Typical +5V only startup and operation current profile (7200-RPM models) . . . . . . . . . . . . . 10 Figure 2. Typical +5V only startup and operation current profile (5400-RPM models) . . . . . . . . . . . . . 10 Figure 3. Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 4. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1.0 Seagate Technology support services SEAGATE ONLINE SUPPORT and SERVICES For information regarding products and services, visit http://www.seagate.com/www/en-us/about/contact_us/ Available services include: Presales & Technical support Global Support Services telephone numbers & business hours Authorized Service Centers For information regarding Warranty Support, visit http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance For information regarding Data Recovery Services,
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2.0 Introduction This manual describes the functional, mechanical and interface specifications for the following Seagate ® Momentus model drives: Standard models Free Fall Protection models ST9750423AS ST9750423ASG ST9750422AS ST9750420AS ST9750420ASG ST9640424AS ST9640423AS ST9640423ASG ST9500424AS ST9500423AS ST9500423ASG These drives provide the following key features: • 5400-RPM spindle speed (on ST9750423AS, ST9750423ASG, ST9640424AS, ST9640423AS & ST9640423ASG models only) • 7200-RPM spi
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2.1 About 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 tran
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3.0 Drive specifications Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. 3.1 Specification summary table The specifications listed in this table are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual. Table 1: Drive specifications for 750, 640 and 500 GB models ST9640424AS ST9750422AS ST9500424AS ST9750423AS ST9640423AS ST9750420AS ST9500423AS Drive specification
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Table 1: Drive specifications for 750, 640 and 500 GB models ST9640424AS ST9750422AS ST9500424AS ST9750423AS ST9640423AS ST9750420AS ST9500423AS Drive specification ST9750423ASG ST9640423ASG ST9750420ASG ST9500423ASG Write power (typical) 1.85W 2.4W Idle mode, low power (typical) 0.55W 0.70W Standby mode (typical) 0.15W *** Sleep mode (typical) 0.15W *** Voltage tolerance (including noise) +5V ± 5% Ambient temperature 0°C to 60°C (operating) –40°C to 70°C (nonoperating) Temperature gradient (
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3.2 Formatted capacity Bytes per sector Model Formatted capacity* Guaranteed sectors (logical) ST9750423AS, ST9750423ASG, ST9750422AS, ST9750420AS and 750GB 1,465,149,168 ST9750420ASG ST9640424AS, ST9640423AS and 512 640GB 1,250,263,728 ST9640423ASG ST9500424AS, ST9500423AS and 500GB 976,773,168 ST9500423ASG *One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. 3.2.1 LBA mode When addres
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3.5 Recording and interface technology Interface Serial ATA (SATA) Recording method Perpendicular Recording density BPI (bits/in max) 1,586k Track density TPI (tracks/in max) 341k 2 Areal density (Gb/in max) 541 Spindle speed (RPM) (± 0.2%) (ST9750423AS, ST9750423ASG, ST9640424AS, ST9640423AS 5400 and ST9640423ASG models only) Spindle speed (RPM) (± 0.2%) (all other models) 7200 Maximum Internal transfer rate (Gb/s) 1130 (ST9750423AS and ST9750423ASG models) Maximum Internal transfer rate (Gb/
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3.7 Seek time Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table below are defined as follows: • Track-to-track seek time is an average of all possible single-track seeks in both directions. • Average seek time is a true statistical random average of at least 5000 measurements of seeks between random tracks, less overhead. Table 2: Typical seek times Typical seek times (ms) Read Track-to-t
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3.9 Power specifications The drive receives DC power (+5V) through a native SATA power connector. 3.9.1 Power consumption Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on an average of drives tested, under nominal conditions, at 25°C ambient temperature. • Spinup power Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating speed. • Seek mode During seek mode, the read/write actuator arm
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3.9.1.1 Typical current profile Figure 1. Typical +5V only startup and operation current profile (7200-RPM models) Figure 2. Typical +5V only startup and operation current profile (5400-RPM models) 10 Momentus Product Manual, Rev. C
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3.9.2 Conducted noise Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on the +5V line. Using 5V power, the drive is expected to operate with a maximum of 100mV peak-to-peak square-wave injected noise at up to 10 MHz. Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current. 3.9.3 Voltage tolerance Voltage tolerance (including noise): 5V ± 5% Momentus Product Manual, Rev. C 11
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3.9.4 Power-management modes The drive provides programmable power management to provide greater energy efficiency. In most systems, you can control power management through the system setup program. The drive features the following power-management modes: Table 4: Power management modes Power modes Heads Spindle Buffer Active (operating) Tracking Rotating Full power Idle, performance Tracking Rotating Self refresh—low power Idle, active Floating Rotating Self refresh—low power Idle, low power
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3.10 Environmental specifications This section provides the temperature, humidity, shock, and vibration specifications for Momentus drives. 3.10.1 Ambient temperature Ambient temperature is defined as the temperature of the environment immediately surrounding the drive. Above 1000 feet (305 meters), the maximum temperature is derated linearly by 1°C every 1000 feet. Operating: 0°C to 60°C (32°F to 140°F) Nonoperating: –40°C to 70°C (–40°F to 158°F) 3.10.2 Temperature gradient Operating 20°C pe
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3.10.6 Shock All shock specifications assume that the drive is mounted securely with the input shock applied at the drive mounting screws. Shock may be applied in the X, Y or Z axis. Note. Additional shock protection is provided by the Free Fall Protection feature on ST9750423ASG, ST9750420ASG, ST9640423ASG and ST9500423ASG models. See Section 3.13.1 for additional information about this feature. 3.10.6.1 Operating shock These drives comply with the performance levels specified in this docume
