2.11Acoustics

Drive emission of sound is measured consistent with the ECMA-74 and its’ referenced standards. Testing is conducted at room temperature (approximately 25°C). Emission levels are reported as the total A-weighted sound power levels for steady state, idle, and active seek modes of operation.

Table 5: Drive A-weighted Sound Power Levels (SWL, BA)

Idle*

Performance seek

 

 

2.4 bels (typ)

2.6 bels (typ)

2.6 bels (max)

2.7 bels (max)

 

 

*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.

Test for Prominent Discrete Tones (PDTs)

Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this pro- cess is the use of the absolute threshold of hearing. Seagate uses the lower limit for the threshold curve* to discern tone audibility and to compensate for the inaudible components of sound prior to computation of tone ratios according to Annex D of the ECMA-74 standards.

*Defined as the median curve given by ISO 389-7 (Tf curve) minus 10dB at all frequencies.

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 2,000 MHz, 10 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

 

 

 

 

 

 

Momentus 5400.5 SATA Product Manual, Rev. B

13

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Seagate ST9250320AS, ST980310ASG manual Acoustics, Electromagnetic immunity, Drive A-weighted Sound Power Levels SWL, BA
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ST9120310ASG, ST9250320AS, ST9120310AS, ST980310AS, ST9160310ASG specifications

The Seagate ST980310ASG, ST9320320AS, ST9200321AS, and ST9160310AS models are part of Seagate's well-regarded line of hard disk drives (HDDs), known for their reliable performance and technological advancements in data storage. These drives feature several key characteristics that make them suitable for various applications, ranging from personal computing to enterprise environments.

The ST980310ASG is a 2.5-inch SATA hard drive with a storage capacity of 80GB. It operates at a speed of 5400 RPM, providing a balance between performance and power efficiency. The drive employs a 16MB cache, which helps enhance data access speeds, making it ideal for everyday computing tasks. Its low power consumption makes it a great choice for laptops or devices requiring energy efficiency.

The ST9320320AS, on the other hand, is a larger 320GB HDD that also benefits from a 2.5-inch form factor. This model runs at 7200 RPM, resulting in faster read and write speeds compared to its lower-RPM counterparts. With an 8MB cache, it is well-suited for applications demanding higher performance, such as gaming and multimedia storage. The ST9320320AS utilizes the SATA interface, providing wide compatibility and ease of integration into various systems.

Moving to the ST9200321AS, this 250GB drive is another 2.5-inch SATA option that emphasizes speed and efficiency. It operates at 5400 RPM and features an 8MB cache. This model is particularly appealing for users seeking an optimal mix of storage capacity and performance for standard computing tasks and moderate data access demands.

Lastly, the ST9160310AS and ST9160310ASG models offer storage capacities of 160GB. Both drives operate at 7200 RPM, ensuring quicker data access and transfer rates. The ST9160310ASG variant addresses specific needs for enhanced performance, often targeting gaming applications and high-performance computing systems. Superbly engineered, these drives include features like advanced error recovery controls, thermal monitoring, and data protection technologies that enhance reliability.

Collectively, these Seagate HDDs encompass diverse storage solutions characterized by their efficient performance, varying capacities, and advanced technologies tailored to meet the needs of different users. Whether for casual use, gaming, or enterprise applications, the ST980310ASG, ST9320320AS, ST9200321AS, and ST9160310AS models remain trusted choices in the realm of computer storage.
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