Seagate ST750LX003, Руководство по эксплуатации продукта

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14 Momentus XT Product Manual, Rev. B
*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 .
Test for Prominent Discrete Tones (PDTs)
Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this pro-
cess 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.
2.12 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:
2.13 Reliability
Measurement type Specification
Nonrecoverable read errors 1 per 10
14
bits read, max.
Annualized Failure Rate (AFR) 0.5%
Load/Unload (U/UL)
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 10% relative humidity
55°C, 16% relative humidity
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
Warranty To determine the warranty for a specific drive, use a web browser to access the
following web page:
support.seagate.com/customer/warranty_validation.jsp
You will be asked to provide the drive serial number, model number (or part num-
ber) and country of purchase. After submitting this information, the system will dis-
play the warranty information for your drive
Table 6: Radio frequency environments
Test Description
Performance
level Reference
standard
Electrostatic discharge Contact, HCP, VCP:
±
4 kV; Air:
±
8 kV B EN 61000-4-2: 95
Radiated RF immunity 80 to 1,000 MHz, 3 V/m,
80% AM with 1 kHz sine
900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz
A EN 61000-4-3: 96
ENV 50204: 95
Electrical fast transient
±
1 kV on AC mains,
±
0.5 kV on external I/O B EN 61000-4-4: 95
Surge immunity
±
1 kV differential,
±
2 kV common, AC mains B EN 61000-4-5: 95
Conducted RF immunity 150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz
sine A EN 61000-4-6: 97
Power Frequency H-field
immunity 1 A/m, 50Hz/60Hz, 3 axes A EN 61000-4-8: 97
Voltage dips, interrupts 30% Reduction for 25 cycles
>95% Reduction for 250 cycles
>95%, 0.5 cycles
C
C
B
EN 61000-4-11: 94