Seagate ST2000VM002 Manual download pdf (Page 20)

20 Pipeline HD SATA Product Manual, Rev. B

Drive Specifications www.seagate.com

2.10 Acoustics

Table 3 Fluid Dynamic Bearing (FDB) motor acoustics

2.0 bels (typ)

2.2 bels (max)

2.2 bels (typ)

2.4 bels (max)

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.

*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:

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)

Idle* Seek

All models

Table 4 Radio frequency environments

Test Description Performance Level Reference standard

Electrostatic

discharge

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

B EN61000-4-2: 95

Radiated RF

immunity

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

80% AM with 1kHz sine

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

A EN61000-4-3: 96

ENV 50204: 95

Electrical fast

transient

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

B EN61000-4-4: 95

Surge immunity ± 1 kV differential, ± 2 kV common, AC mains B EN61000-4-5: 95

Conducted RF

immunity

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

sine

A EN61000-4-6: 97

Voltage dips,

interrupts

0% open, 5 seconds

0% short, 5 seconds

40%, 0.10 seconds

70%, 0.01 seconds

EN61000-4-11: 94

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