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Barracuda SATA Product Manual, Rev. B 23
www.seagate.com Drive Specifications
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 7:
2.12 Reliability
The product shall achieve an Annualized Failure Rate (AFR) of 0.34% (MTBF of 0.75 million hours) when operated
in an environment of ambient air temperatures of 25
°C. Operation at temperatures outside the specifications in
Section 2.9 may increase the product AFR (decrease MTBF). AFR and MTBF are population statistics that are not
relevant to individual units.
AFR and MTBF specifications are based on the following assumptions for desktop personal computer
environments:
• 2400 power-on-hours per year.
• 10,000 average motor start/stop cycles per year.
• Operations at nominal voltages.
• Temperatures outside the specifications
in Section 2.9 may reduce the product reliability.
• Normal I/O duty cycle for desktop personal computers. Operation at excessive I/O duty cycle may degrade
pr
oduct reliability.
The desktop personal computer environment of power-on-hours, temp
erature, and I/O duty cycle affect the product
AFR and MTBF. The AFR and MTBF will be degraded if used in an enterprise application
Table 7 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
Nonrecoverable read errors 1 per 10
14
bits read, max
Annualized Failure Rate (AFR) 0.34% (nominal power, 25°C ambient temperature)
Contact start-stop cycles 50,000 cycles
(at nominal voltage and temperature, with 60 cycles per hour and a 50% duty cycle)
Preventive maintenance None required.