2.8.6.4Nonoperating random vibration

The test consists of 15 minutes of random vibration using the power spectral density (PSD) levels specified in the table below. The vibration test level is 3.01 Gs RMS. The drive does not incur any physical damage when subsequently put into operation.

Table 5: Nonoperating random vibration profile.

Frequency (Hz)

G2/Hz

 

 

2.5

1.0 x E-03

 

 

5

3.0 x E-02

 

 

40

1.8 x E-02

 

 

500

1.8 x E-02

 

 

2.8.7Corrosive environment

Seagate electronic drive components pass accelerated corrosion testing equivalent to ten years of exposure to light industrial environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM B845. However, this accelerated testing cannot duplicate every potential application environment.

Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corro- sive chemicals as electronic drive component reliability can be affected by the installation environment. The sil- ver, copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide, chloride, and nitrate contaminants. Sulfur is found to be the most damaging. In addition, electronic components should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or exposed to an ambient relative humidity greater than 95 percent. Materials used in cabinet fabrication, such as vulcanized rubber, that can outgas corrosive compounds should be minimized or eliminated. The useful life of any electronic equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.

2.9Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). Discrete tone penalties are added to the A-weighted sound power (LW) with the following formula only when determin- ing compliance:

LWt(spec) == LW + 0.1Pt + 0.3 < 4.0 (Bels) where

LW = A-weighted sound power level

pt == Value of discrete tone penalty [==dLt-6.0 (dBA)]

dLt = Tone-to-noise ratio taken in accordance with ISO 7779 at each octave band.

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.)

Table 6:

Drive level acoustics

 

Acoustic mode

 

 

 

Idle

 

Operational

 

 

 

1.6 bels (typ)

 

2.2 bels (typ)

 

 

 

12

Lyrion Series IDE Product Manual, Rev. F

Page 17 Page 19
Page 18
Image 18
Seagate ST740211DE-40GB Acoustics, Nonoperating random vibration profile, Corrosive environment, Drive level acoustics
Page 17 Page 19

ST740211DE-40GB, ST760211DE-60GB, ST730212DE-30GB specifications

Seagate, a renowned name in the storage solutions industry, has made significant contributions with its range of hard disk drives (HDDs) designed for various applications. Among these are the Seagate ST730212DE-30GB, ST760211DE-60GB, and ST740211DE-40GB models. Each of these drives brings unique features and technologies tailored to meet the demands of users seeking reliable data storage.

Starting with the Seagate ST730212DE-30GB, this drive offers a compact storage solution with a capacity of 30GB, making it suitable for handheld devices or applications where space is a premium. The ST730212DE utilizes a 2.5-inch form factor, which allows for easy integration into various devices while ensuring portability. This HDD is built with an average latency of 12 ms and a spindle speed of 4,200 RPM, which provides a decent performance for applications that require quick access to stored data. Its ATA interface ensures compatibility with a wide range of systems, providing flexibility for users.

Next in line is the Seagate ST760211DE-60GB, which doubles the storage capacity of the previous model to 60GB. The ST760211DE is designed for slightly more demanding applications, making it ideal for users who require additional storage without compromising on size. Similar to the ST730212DE, this drive features a 2.5-inch form factor and operates at a spindle speed of 4,200 RPM. Its enhanced capacity allows for more extensive media libraries, applications, and files, while the ATA interface maintains broad compatibility.

Finally, the Seagate ST740211DE-40GB strikes a balance between the two preceding models, offering 40GB of storage. This drive caters to those who need more than what the ST730212DE offers but do not require the full 60GB of the ST760211DE. With the same dimensions and spindle speed, the ST740211DE is versatile and can fit various applications, from laptops to gaming consoles, all while ensuring optimal performance.

All three models embody Seagate's commitment to reliability and performance. They incorporate advanced technologies for data integrity and longevity, along with robust error correction features that minimize the risk of data loss. With their varying capacities and consistent form factors, users can choose the drive that best suits their needs, making these models a great choice for both casual and professional use. Overall, the Seagate ST730212DE-30GB, ST760211DE-60GB, and ST740211DE-40GB represent excellent options for those seeking dependable storage solutions.
Top Page Image Contents