2.11Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea- surements are consistent with ISO document 7779. Sound power measurements are taken under essentially free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward.

Note. For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is defined by the following equation:

(Number of seeks per second = 0.4 / (average latency + average access time))

Table 5:

Drive level acoustics

 

 

 

 

 

 

 

 

Models

 

 

 

Idle*

Performance seek

 

 

 

 

 

 

2 discs

 

ST91608220AS

 

2.4 bels (typ)

3.0 bels (typ)

 

 

ST91208220AS

 

2.6 bels (max)

3.2 bels (max)

 

 

ST91008220AS

 

 

 

 

 

 

 

 

 

1 disc

 

ST9808212AS

 

2.2 bels (typ)

2.9 bels (typ)

 

 

ST9608210AS

 

2.4 bels (max)

3.1 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.

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 5400.3 PSD SATA Product Manual, Rev. A

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Seagate ST91208220AS, ST9808212AS Acoustics, Electromagnetic immunity, Drive level acoustics, Radio frequency environments
Page 22 Page 24

ST91608220AS, ST9608210AS, ST91208220AS, ST9808212AS, ST91008220AS specifications

Seagate is a renowned name in the data storage industry, offering high-quality hard disk drives that cater to various needs. Among its product lineup, the Seagate ST91008220AS, ST9808212AS, ST91208220AS, ST9608210AS, and ST91608220AS are significant models that showcase the company’s commitment to innovation and performance.

The ST91008220AS is a 1TB drive with a 7200 RPM rotational speed, designed primarily for desktop computers. Its SATA 3 Gb/s interface facilitates faster data transfer rates, making it ideal for users who require additional storage without sacrificing performance. The drive’s 32 MB cache enhances read and write speeds, ensuring swift access to files and applications.

Next in line, the ST9808212AS is also a 7200 RPM drive, but it offers a capacity of 80GB. This model is tailored more for entry-level systems, where space is limited but reliability is crucial. With its efficient data management features, it provides a robust solution for everyday computing tasks.

The ST91208220AS offers a balanced combination of performance and capacity, packing 120GB of storage into a similar 7200 RPM design. This model is well-suited for general use in both desktop and gaming environments, providing ample space for operating systems, applications, and games without compromising on speed.

For users seeking a high-performance option, the ST9608210AS stands out with its 600GB storage capacity. With a rotation speed of 10000 RPM, this drive is tailored for demanding applications such as video editing and gaming, where fast access to data is essential. Its SAS interface allows for even more efficient data management in enterprise environments.

Lastly, the ST91608220AS is another 160GB option, also designed for environments that demand high performance. This drive's enhanced reliability features, such as error correction and thermal management, allow it to excel in heavy-use conditions.

All these models include key technologies like Seagate’s SmartAlign, which helps users transition to advanced formatting with ease, and Adaptive Differential Encoding, enhancing data integrity. Additionally, these drives support a variety of platforms and systems, making them versatile options for consumers and businesses alike.

In summary, the Seagate ST91008220AS, ST9808212AS, ST91208220AS, ST9608210AS, and ST91608220AS are primed for diverse storage needs, delivering excellent performance and reliability across different applications and environments. Their combination of rotational speeds, cache sizes, and advanced technologies ensures that Seagate remains a leader in the hard drive market.
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