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2.12
Reliability
2.12.1
Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
The product shall achieve an Annualized Failure Rate (AFR) of 0.80% (MTBF of 1+ million hours) when
operated in an environment of ambient air temperatures of 25°C, assuming delta between ambient air
temperature and HDD case temperature is less than 15°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 Digital Video Surveillance computer
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 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
product reliability.
The surveillance environment of power-on-hours, temperature, and I/O duty cycle affect the product AFR and
MTBF. The AFR and MTBF will be degraded if used in a enterprise application.
Nonrecoverable read errors
Annualized Failure Rate (AFR)
Contact start-stop cycles
Warranty
Preventive maintenance
18
14
1 per 10
bits read, max
0.80% (nominal power, 25°C ambient temperature)
50,000 cycles
(at nominal voltage and temperature, with 60 cycles per hour and a 50% duty cycle)
To determine the warranty for a specific drive, use a web browser to access the fol-
lowing web page:
http://www.seagate.com/support/service/
From this page, click on the "Verify Your Warranty" link. You will be asked to provide
the drive serial number, model number (or part number) and country of purchase.
The system will display the warranty information for your drive.
None required.
SV35.3 Series Serial ATA Product Manual, Rev. B
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