Drive Specifications

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500, 320, 250 and 160GB models

The non-operating shock level that the drive can experience without incurring physical damage or degradation in performance when subsequently put into operation is 350 Gs based on a non-repetitive half-sine shock pulse of 2-ms duration.

2.9.6 Vibration

All vibration specifications assume that the drive is mounted securely with the input vibration applied at the drive mounting screws. Vibration may be applied in the X, Y or Z axis.

2.9.6.1Operating vibration

The maximum vibration levels that the drive may experience while meeting the performance standards specified in this document are specified below.

2Hz to 22Hz

0.25

Gs (Limited displacement)

 

 

 

22Hz to 350Hz

0.50

Gs

 

 

 

350Hz to 500Hz

0.25

Gs

 

 

 

2.9.6.2Non-operating vibration

The maximum non-operating vibration levels that the drive may experience without incurring physical damage or degradation in performance when subsequently put into operation are specified below.

5Hz to 22Hz

3.0

Gs (Limited displacement)

 

 

 

22Hz to 350Hz

3.0

Gs

 

 

 

350Hz to 500Hz

3.0

Gs

 

 

 

2.10 Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All measurements 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.

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

Note

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

Table 6 Fluid Dynamic Bearing (FDB) motor acoustics

All models

Idle*

Seek

2.6 bels (typ)

2.8 bels (typ)

2.7 bels (max)

3.0 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.

2.10.1 Test for Prominent Discrete Tones (PDTs)

Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this process is the use of the absolute threshold of hearing. Seagate uses this threshold curve (originated in ISO 389-

7)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.

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Barracuda SATA Product Manual, Rev. B

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Seagate ST3750525AS, SGTST3000DM0011CH166, ST31000524AS manual Vibration, Acoustics, Test for Prominent Discrete Tones PDTs
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ST3750525AS, ST3320413AS, ST4000DM000, ST3250312AS, ST31000524AS specifications

Seagate is a renowned name in the field of data storage, known for its innovative hard disk drives (HDDs) that cater to various needs. Among its extensive product lineup, the Seagate ST3500413AS, ST3160316AS, SGTST3000DM0011CH166, ST31000524AS, and ST3250312AS stand out due to their unique features and performance characteristics.

The Seagate ST3500413AS is a 500GB SATA drive exhibiting a 7200 RPM spin speed, which allows for quick data access and file transfers. It features a 16MB cache, enhancing performance by allowing frequently accessed data to be stored in a readily available state. This drive is particularly suitable for users with moderate storage needs, such as home offices and casual gaming.

On the other hand, the ST3160316AS offers a larger 1.5TB capacity. Like the ST3500413AS, it operates at 7200 RPM and comes equipped with a 32MB cache that boosts read/write speeds. This HDD is ideal for users who require additional space for media files, backups, or extensive applications.

The SGTST3000DM0011CH166 is part of Seagate's Barracuda series, renowned for its balance of performance and capacity. This 3TB drive operates on SATA III at 7200 RPM and features a 64MB cache, making it suitable for high-demand applications such as gaming rigs and multimedia servers. Its Storage capacities and speed allow users to store a significant amount of data without compromising performance.

The ST31000524AS is another prominent Seagate model that offers 1TB of storage with a similar 7200 RPM speed. This HDD is characterized by its reliability and efficiency, making it perfect for systems requiring robust data storage solutions. The 32MB cache further aids in data access speed, making it suitable for task-intensive applications.

Lastly, the ST3250312AS provides a 2TB capacity and mirrors the 7200 RPM spin speed found in the other models. With a 32MB cache, it is designed for home and small business use, offering a balance of performance and capacity. This HDD is particularly appealing for users needing to store large files without compromising on data retrieval times.

In summary, Seagate's lineup, including the ST3500413AS, ST3160316AS, SGTST3000DM0011CH166, ST31000524AS, and ST3250312AS, presents a range of storage solutions ideal for different user needs. From casual users to demanding applications, these drives utilize advanced technologies to ensure reliability, speed, and adequate storage capacity for a wide array of digital data.
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