Seagate Archive HDD Product Manual, Rev. D
12
2.12
Reliability
2.12.1
Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)
The product shall achieve an Annualized Failure Rate (AFR) of <1% (MTBF of 800K hours) when operated at an
nominal power and typical case temperatures of 40°C. Operation at temperatures outside the specifications in
Section 2.8 Environmental specifications
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 Environmental specifications
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 nearline environment of power-on-hours, temperature, and I/O duty cycle affect the
product AFR and MTBF.
2.13
Agency certification
2.13.1
Safety certification
These products are certified to meet the requirements of UL60950-1, CSA60950-1 and EN60950 and so marked
as to the certify agency.
2.13.2
Electromagnetic compatibility
Hard drives that display the CE mark comply with the European Union (EU) requirements specified in the
Electromagnetic Compatibility Directive (2004/108/EC) as put into place 20 July 2007. Testing is performed to the
levels specified by the product standards for Information Technology Equipment (ITE). Emission levels are defined
by EN 55022, Class B and the immunity levels are defined by EN 55024.
Drives are tested in representative end-user systems. Although CE-marked Seagate drives comply with the
directives when used in the test systems, we cannot guarantee that all systems will comply with the directives.
The drive is designed for operation inside a properly designed enclosure, with properly shielded I/O cable (if
necessary) and terminators on all unused I/O ports. Computer manufacturers and system integrators should
confirm EMC compliance and provide CE marking for their products.
Nonrecoverable read errors
1 per 10
14
bits read, max
Annualized Failure Rate (AFR)
<1% (nominal power, 25°C air temperature)
Load unload cycles
300,000 cycles
Workload rate limit
Average rate of <180TB/year
The AFR 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 AFR 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).
Warranty
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 the "Check to see if the drive is under Warranty" link. Users 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 the drive.
Preventive maintenance
None required.
