2.12Electromagnetic immunity

When properly installed in a representative host system, the drive operates without errors or degradation in performance when subjected to the radio frequency (RF) environments defined in the following table:

Table 6:

Radio frequency environments

 

 

 

 

 

 

 

 

 

 

Performance

Reference

Test

 

Description

level

standard

 

 

 

 

Electrostatic discharge

Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV

B

EN 61000-4-2: 95

 

 

 

 

Radiated RF immunity

80 to 1,000 MHz, 3 V/m,

A

EN 61000-4-3: 96

 

 

80% AM with 1 kHz sine

 

ENV 50204: 95

 

 

900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz

 

 

 

 

 

 

Electrical fast transient

± 1 kV on AC mains, ± 0.5 kV on external I/O

B

EN 61000-4-4: 95

 

 

 

 

Surge immunity

± 1 kV differential, ± 2 kV common, AC mains

B

EN 61000-4-5: 95

 

 

 

 

Conducted RF immunity

150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz

A

EN 61000-4-6: 97

 

 

sine

 

 

 

 

 

 

Power Frequency H-field

1 A/m, 50Hz/60Hz, 3 axes

A

EN 61000-4-8: 97

immunity

 

 

 

 

 

 

 

 

Voltage dips, interrupts

30% Reduction for 25 cycles

C

EN 61000-4-11: 94

 

 

>95% Reduction for 250 cycles

C

 

 

 

>95%, 0.5 cycles

B

 

 

 

 

 

 

2.13Reliability

Measurement type

Specification

 

 

Nonrecoverable read errors

1 per 1014 bits read, max.

Annualized Failure Rate (AFR)

0.5%

 

 

Load/Unload (U/UL)

 

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

For information regarding Warranty Support, visit

 

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

 

 

2.13.1Free Fall Protection feature

The Free Fall Protection feature provides enhanced data protection against shock events that may occur while the drive is operating. This feature is designed to decrease the likelihood of data loss by detecting a free fall event and unloading the actuator before a shock takes place in falls of >8 inches (nominal). The drive uses a 0G sensor mounted on the printed circuit board assembly (PCBA) to sense this event.

To enable the Free Fall Protection feature on ST9500420ASG, ST9320423ASG, ST9250410ASG, ST9160412ASG, ST9120410ASG and ST980412ASG models, use Set Features command 41h. To disable this feature, use Set Features command C1h.

Information about Free Fall Events that have occurred is available through SMART Attribute FEh.

Note. The Free Fall Protection feature is provided only on ST9500420ASG, ST9320423ASG, ST9250410ASG, ST9160412ASG, ST9120410ASG and ST980412ASG models.

14

Momentus 7200.4 SATA Product Manual, Rev. C

Page 20
Image 20
Seagate ST9500420ASG Electromagnetic immunity, Reliability, Radio frequency environments, Free Fall Protection feature

ST903203N1A2ASRK, ST905003N1A1ASRK, ST9160412AS, ST9250410ASG, ST9160412ASG specifications

Seagate technology has long been at the forefront of data storage solutions, and its line of hard drives exemplifies the blend of reliability, performance, and storage capacity. Among these, the Seagate ST9500420AS, ST9120410ASG, ST9320423AS, ST90250N1A1ASRK, and ST980412AS stand out as quality options suitable for various computing needs.

The Seagate ST9500420AS is a 500GB 2.5-inch SATA hard drive designed primarily for laptop users. It features a rotational speed of 5400 RPM, balancing performance with energy efficiency. The adoption of Advanced Format technology enhances its sector size, allowing for improved data integrity and capacity. Additionally, the drive supports Native Command Queuing (NCQ), which can optimize the drive's performance by managing multiple commands more efficiently.

Another notable model is the ST9120410ASG, a 120GB hard drive that caters to users seeking a compact yet efficient storage solution. Primarily used in laptops and external enclosures, this drive also operates at 5400 RPM. Combining a 2.5-inch form factor with a SATA interface, it allows for swift data transfers while maintaining low power consumption, which is essential for portable devices.

The ST9320423AS is another 2.5-inch hard drive, boasting a capacity of 320GB. This drive is notable for its shock protection features, which safeguard data against physical impacts, making it ideal for mobile computing environments. Like its counterparts, it also utilizes SATA technology and operates efficiently, ensuring that users have access to reliable storage without compromising on performance.

For more specialized applications, the ST90250N1A1ASRK provides a substantial 250GB capacity in a compact form factor. Engineered for demanding environments, this drive showcases Seagate's commitment to creating robust, long-lasting products. It combines speed with durability, representing an excellent choice for systems requiring frequent read/write operations.

Finally, the ST980412AS is a 80GB variant that remains a staple for users needing reliable data storage without excessive capacity. This drive supports similar technologies as its peers, ensuring effective performance for everyday computing tasks. Its lightweight design and efficient power utilization make it suitable for both personal and professional use.

In summary, these Seagate hard drives embody a blend of advanced technologies, extensive capacities, and reliability. Whether for casual use, professional applications, or portable computing, each model offers unique features tailored to meet diverse user needs. With a history of innovation, Seagate remains a leader in the data storage sector, ensuring that users have access to high-quality solutions across the board.