Seagate IronWolf Pro v6 Serial ATA Product Manual, Rev. B (Draft 4)
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2.7
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.
)
*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
.
2.8
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.
2.9
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 l average access time
Table 6
Fluid Dynamic Bearing (FDB) motor acoustics
Idle*
Performance seek
8TB, 6TB & 4TB models
2.8 bels (typ)
3.0 bels (max)
3.2 bels (typ)
3.4 bels (max)
2TB models
2.2 bels (typ)
2.4 bels (max)
2.6 bels (typ)
2.8 bels (max)
Table 7
Radio frequency environments
Specification
Test method
Test Conditions
Compliance
Electrostatic discharge
IEC/EN 61000-4-2
± 4 kV Contact / HCP, VCP /
± 8 kV Air
(minimum of 500 discharges applied)
Compliant
Radiated RF immunity
IEC/EN 61000-4-3
80 -1000 MHz, 3 V/m, 80% 1 kHz AM
Compliant
EFT / Burst
IEC/EN 61000-4-4
± 0.5 kV I/O, ± 1.0 kV AC mains
Compliant
Surge immunity
IEC/EN 61000-4-5
AC mains: 1.2/50 μs @ ± 2 kV common mode,
± 1 kV differential
Compliant
Conducted RF immunity
IEC/EN 61000-4-6
150 kHz to 80 MHz, 3 Vrms, 80% 1 kHz AM,
AC input, DC input and I/O
Compliant
Power Frequency H-field immunity
IEC/EN 61000-4-8
1 A/m, 50/60 Hz, 3 axes, 400 gauss
Compliant
Voltage dips and interrupts
IEC/EN 61000-4-11
>95% reduction for 0.5 cycles,
30% reduction for 25 cycles,
>95% reduction for 250 cycles
Compliant
