2.10Acoustics

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 13: Fluid Dynamic Bearing (FDB) motor acoustics

 

Idle*

Seek

 

 

 

ST3750640AS, ST3750840AS, ST3500630AS, ST3500830AS

2.8 bels (typ)

3.7 bels (typ)**

3.0 bels (max)

3.9 bels (max)**

 

ST3400620AS, ST3400820AS

2.7 bels (typ)

3.4 bels (typ)**

2.9 bels (max)

3.6 bels (max)**

 

ST3320620AS, ST3320820AS, ST3300620AS, ST3300820AS,

2.5 bels (typ)

3.0 bels (typ)**

ST3250620AS, ST3250820AS, ST3200820AS

2.9 bels (max)

3.2 bels (max)**

ST3250410AS, ST3250310AS

2.6 bels (typ)

2.7 bels (typ)***

2.7 bels (max)

2.8 bels (max)***

 

ST3160815AS, ST3160310AS, ST3160215AS, ST3120815AS,

2.8 bels (typ)

3.0 bels (typ)***

ST3120215AS, ST380815AS, ST380215AS, ST340815AS,

3.0 bels (max)

3.2 bels (max)***

ST340215AS

 

 

*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.

**Measured in performance mode.

***Measured in quiet mode.

2.10.1Test 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 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.

Barracuda 7200.10 Serial ATA Product Manual, Rev. K

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Seagate ST3160215AS manual Acoustics, Fluid Dynamic Bearing FDB motor acoustics, Test for Prominent Discrete Tones PDTs
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ST3200820AS, ST3300820AS, ST3300620AS, ST3500641ASRK, ST3400820AS specifications

The Seagate ST3250310AS and ST3250410AS are notable hard drives that belong to the Barracuda series, known for their value and performance in the consumer and business sectors. These drives, featuring SATA interface technology, are especially popular among users seeking reliable storage solutions for desktops and personal computers.

The ST3250310AS model comes with a storage capacity of 250 GB, while the ST3250410AS offers an increased capacity of 400 GB. Both models are designed with a standard 3.5-inch form factor, making them compatible with most PC enclosures. The drives are equipped with a 7200 RPM rotational speed, which provides enhanced data access times and improved overall performance compared to slower drives.

One of the key features of these devices is their utilization of the SATA 3.0 interface, allowing for data transfer rates of up to 3 Gbps. This interface enhances the drive's performance when paired with compatible motherboards and systems. Additionally, the drives are equipped with a 16 MB buffer, which assists in improving the efficiency of the read and write operations, particularly during tasks that require frequent data access.

Seagate's Advanced Format technology is another characteristic of the ST3250310AS and ST3250410AS. This technology uses larger sector sizes, which allows for more efficient storage of data, resulting in increased capacity and potentially improved reliability. Furthermore, the drives come with a mean time between failures (MTBF) rating of about 1,000,000 hours, signifying their robust build quality designed for durability in varied computing environments.

The hard drives also leverage Seagate's SmartAlign technology, facilitating the drive's operation with Advanced Format hard drives seamlessly. The drives are compatible with various operating systems and are particularly suited for applications requiring high data availability and fast retrieval, such as gaming and media storage.

In summary, the Seagate ST3250310AS and ST3250410AS hard drives are solid options for users looking for dependable, high-performance storage solutions. Their blend of reliability, speed, and efficiency makes them suitable for a variety of applications, from personal computing to small business use. With their combination of advanced technologies and user-friendly characteristics, these drives stand out as capable choices for enhancing computer storage capabilities.
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