Seagate ST32000646SS, ST31000524NS, ST3500514NS, ST32000644NS, 100516232, ST32000647SS Reliability

3.13Reliability

3.13.1Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)

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 1015 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.

Constellation ES Serial ATA Product Manual, Rev. G 21