Seagate ST3500320SV ユーザーズマニュアル

18

SV35.3 Series Serial ATA Product Manual, Rev. B

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

1 per 10

14

 bits read, max

Annualized Failure Rate (AFR)

0.80% (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)

Warranty

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.

Preventive maintenance

None required.