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 (°C/hour max)

20°C (operating), 35°C (nonoperating)

 

 

 

 

 

 

Relative humidity

5% to 95% (operating and nonoperating)

 

 

 

 

 

 

 

Relative humidity gradient

30% per hour max

 

 

 

 

 

 

 

Wet bulb temperature (°C max)

37.7 °C (operating), 40 °C (nonoperating)

 

 

 

 

 

 

Altitude, operating

–304.8 m to 3,048 m (–1,000 ft to 10,000+ ft)

 

 

Altitude, nonoperating

–304.8 m to 12,192 m (–1000 ft to 40,000+ ft)

 

 

(meters below mean sea level, max)

 

 

 

 

Shock, operating (Gs max at 2 ms)

350

 

 

 

 

 

 

 

 

Shock, nonoperating (Gs max at 2 ms)

800

 

 

 

 

 

 

 

 

Shock, nonoperating (Gs max at 1 msec)

1000

 

 

 

 

 

 

 

 

Shock, nonoperating (Gs max at 0.5 ms)

1000

 

 

 

 

 

 

 

Vibration, operating

2.0 G (0 to peak, 5–200 Hz)

 

 

 

 

1.0 G (0 to peak, 200–500 Hz)

 

 

 

 

 

 

Vibration, nonoperating

5 Gs (0 to peak, 5–500 Hz)

 

 

 

 

 

 

 

Drive acoustics, sound power (bels)

 

 

 

 

Idle**

 

2.3 (typical)

 

 

 

 

 

2.5 (max)

 

 

 

 

 

 

 

 

Performance seek

2.6 (typical)

 

 

 

 

 

2.7 (max)

 

 

 

 

 

 

 

 

Nonrecoverable read errors

1 per 1014 bits read

 

 

 

Annualized Failure Rate (AFR)

0.5%

 

 

 

 

 

 

 

 

Load/Unload (U/UL) cycles

 

 

 

 

25°C, 50% relative humidity

600,000 software-controlled power on/off cycles

 

 

 

50,000 hard power on/off cycles

 

 

32°C, 80% relative humidity

600,000 software-controlled power on/off cycles

 

5°C, 80% relative humidity

50,000 hard power on/off cycles

 

 

5°C, 10% relative humidity

 

 

 

 

55°C, 16% relative humidity

 

 

 

 

 

 

 

Warranty

 

To determine the warranty for a specific drive, use a web browser to access the following

 

 

web page: http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance

 

 

From this page, click on the “Verify Your Warranty” link. You will be asked to provide the drive

 

 

serial number, model number (or part number) and country of purchase. The system will dis-

 

 

play the warranty information for your drive.

 

 

Supports Hotplug operation per

Yes (requires COMRESET from host after a hotplug event)

 

Serial ATA Revision 2.6 specification

 

 

 

 

 

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.

**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

***Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby modes will not contribute to battery power consumption.

Momentus Product Manual, Rev. C

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Seagate ST9500423AS, ST9750422AS, ST9750424AS, ST9750423ASG, ST9750420ASG, ST9640422AS, ST9640423ASG Altitude, nonoperating
Page 10 Page 12

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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