Seagate SV35/SuveiSRS HDD Product Manual, Rev. C
15
Drive Specifications
2.10.1 Test for Prominent Discrete Tones (PDTs)
Manufacturer 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. Manufacturer 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
Table 4
.
2.12
MTBF and Warranty
Bare drive warranty terms - 3-year coverage
The product will achieve a Mean Time Between Failure (MTBF) of 1,000,000 hours when operated in an
environment of ambient air temperatures of 25°C. Operation at temperatures outside the specifications shown in
Environmental specifications
on page 13
may decrease the product MTBF. MTBF is a population statistics that is
not relevant to individual units.
MTBF specifications are based on the following assumptions for Surveillance environments:
•
8760 power-on-hours per year
•
10,000 average motor start/stop cycles per year
•
Operations at nominal voltages
•
Temperatures outside the specifications in
Environmental specifications
on page 13
may reduce the product
reliability.
•
Normal I/O duty cycle for consumer electronics environments. Operation at excessive I/O duty cycle may
degrade product reliability.
The Surveillance environment of power-on-hours, temperature, and I/O duty cycle affect the product MTBF. The
MTBF will be degraded if used in an enterprise application.
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
ENV50204: 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
C
C
C
B
EN61000-4-11: 94
