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2.9
R
ELIABILITY
2.9.1
Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
The product shall achieve an Annualized Failure Rate (AFR) of 1.1% (MTBF of 800 thousand hours) when operated
a nominal power and typical case temperatures of 40°C. Operation at temperatures outside the specifications in Section
2.8 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:
• 8760 power-on-hours per year.
• Operations at nominal voltages.
• Temperatures outside the specifications in Section 2.8 may reduce the product reliability.
• A workload rate below the average annualized specified limits. Operation at excessive I/O duty cycle may degrade
product reliability.
• The enterprise application environment of power-on-hours, temperature, and I/O duty cycle effects the product
AFR and MTBF.
Nonrecoverable read errors
Annualized Failure Rate
Load unload cycles
Rated Workload
Warranty
Preventive maintenance
Seagate Kinetic HDD Product Manual, Rev. B
Table 11: AFR and MTBF Specifications
1 per 1014 bits read, max
1.1% (nominal power, 40°C case temperature)
300,000 cycles
Average rate of <180TB/year
The MTBF specification for the drive assumes the I/O workload does not exceed the
Average Annualized Workload Rate Limit of <180TB/year. Workloads exceeding the
annualized rate may degrade the drive MTBF and impact product reliability. The Average
Annualized Workload Rate Limit is in units of TB per year, or TB per 8760 power on hours.
Workload Rate = TB transferred x (8760 / recorded power on hours).
To determine the warranty for a specific drive, use a web browser to access the following
web page: http://www.seagate.com/support/warranty-and-replacements/.
From this page, click on the "Check to see if the drive is under Warranty" link. The following
are required to be provided: the drive serial number, model number (or part number) and
country of purchase.The system will display the warranty information for the drive.
None required.
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