Seagate 100516232 ユーザーズマニュアル

Constellation ES Serial ATA Product Manual, Rev. G

21

The product shall achieve an Annualized Failure Rate (AFR) of 0.73% (MTBF of 1.2 million hours) when oper-
ated nominal power and typical case temperatures of 40°C. Operation at temperatures outside the specifica-
tions in Section 3.9 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 business critical storage system 
environments:

• 8,760 power-on-hours per year.

• Operations at nominal voltages.

• Temperatures outside the specifications in Section 3.9 may reduce thee product reliability.

• Normal I/O duty cycle for enterprise nearline applications. Operation at excessive I/O duty cycle may 

degrade product reliability.

The enterprise application nearline environment of power-on-hours, temperature, and I/O duty cycle affect the 
product AFR and MTBF.

Nonrecoverable read errors

1 per 10

15

 bits read, max

Annualized Failure Rate (AFR)

0.73% (nominal power, 40°C case temperature)

Load unload cycles

300,000 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

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.