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Seagate ST2000VM002 Acoustics, Test for Prominent Discrete Tones PDTs, Electromagnetic immunity

Models: ST2000VM002 ST1500VM002

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Drive Specifications

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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 3 Fluid Dynamic Bearing (FDB) motor acoustics

 

Idle*

Seek

 

 

 

All models

2.0 bels (typ)

2.2 bels (typ)

2.2 bels (max)

2.4 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.

2.11 Electromagnetic 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 4 Radio frequency environments

Test

Description

Performance Level

Reference standard

 

 

 

 

Electrostatic

Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV

B

EN61000-4-2: 95

discharge

 

 

 

 

 

 

 

 

 

Radiated RF

80MHz to 1,000MHz, 3 V/m,

A

EN61000-4-3: 96

80% AM with 1kHz sine

 

ENV 50204: 95

immunity

 

900MHz, 3 V/m, 50% pulse modulation @ 200Hz

 

 

 

 

 

 

 

 

 

Electrical fast

± 1 kV on AC mains, ± 0.5 kV on external I/O

B

EN61000-4-4: 95

transient

 

 

 

 

 

 

 

 

 

Surge immunity

± 1 kV differential, ± 2 kV common, AC mains

B

EN61000-4-5: 95

 

 

 

 

Conducted RF

150kHz to 80MHz, 3 Vrms, 80% AM with 1kHz

A

EN61000-4-6: 97

immunity

sine

 

 

 

 

 

 

 

0% open, 5 seconds

C

EN61000-4-11: 94

Voltage dips,

0% short, 5 seconds

C

 

interrupts

40%, 0.10 seconds

C

 

 

70%, 0.01 seconds

B

 

 

 

 

 

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Pipeline HD SATA Product Manual, Rev. B

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Seagate ST2000VM002 Acoustics, Test for Prominent Discrete Tones PDTs, Electromagnetic immunity, Idle Seek All models
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ST2000VM002, ST1500VM002 specifications

The Seagate ST1500VM002 and ST2000VM002 are part of the Seagate Video 3.5 Series, designed specifically for surveillance systems and DVRs. These hard drives provide robust storage solutions tailored to handle the high demands of continuous video recording and playback.

Both models boast a 3.5-inch form factor and utilize SATA III interfaces, ensuring fast data transfer rates essential for processing large video files from multiple security cameras. The ST1500VM002 offers a storage capacity of 1.5TB, while the ST2000VM002 provides an enhanced capacity of 2TB, making them suitable for extensive surveillance setups that may require longer retention of video content.

One of the most significant features of these drives is their support for 24/7 operation, allowing them to perform reliably and efficiently under constant load. This aspect is particularly important for security applications where data is consistently being recorded and accessed without downtime. Moreover, both models are optimized for high workload rates, capable of handling workloads of up to 180TB per year, which is essential for the rigorous demands of surveillance use.

The Seagate ST1500VM002 and ST2000VM002 also feature advanced technologies that help enhance performance and reliability. These drives incorporate AgileArray technology, which optimizes drive performance in multi-drive systems and improves RAID performance. This technology also features error recovery controls, which are critical for maintaining data integrity over time.

In terms of reliability, both drives are built with robust components designed to withstand the harsh conditions typically associated with surveillance environments. They come equipped with high shock resistance, ensuring they remain functional in various conditions, preserving valuable data even in the event of physical impacts or vibrations.

Furthermore, they include features like Seagate Rescue Data Recovery Services, providing customers peace of mind knowing that their data can be recovered in unexpected scenarios. Overall, the Seagate ST1500VM002 and ST2000VM002 are excellent choices for anyone in need of high-capacity, reliable storage solutions for their surveillance needs, offering a blend of advanced technology, robust performance, and dependable data integrity.