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2.10
Reliability
2.10.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
The production disk drive shall achieve an annualized failure-rate of 0.73% (MTBF of 1,200,000 hours) over a 5 year service life when
used in Enterprise Storage field conditions as limited by the following:
• 8760 power-on hours per year.
• HDA temperature as reported by the drive <= 40°C
• Ambient wet bulb temp <= 26°C
• The AFR (MTBF) is a population statistic not relevant to individual units
• ANSI/ISA S71.04-2013 G2 classification levels and dust contamination to ISO 14644-1 Class 8 standards (as measured at the device)
The MTBF specification for the drive assumes the operating environment is designed to maintain nominal drive temperature and
humidity. The rated MTBF is based upon a sustained drive temperature of up to 122°F (40°C) and wet bulb temperature up to 78.8°F
(26°C). Occasional excursions in operating conditions between the rated MTBF conditions and the maximum drive operating
conditions may occur without significant impact to the rated MTBF. However continual or sustained operation beyond the rated
MTBF conditions will degrade the drive MTBF and reduce product reliability.
Nonrecoverable read errors
Annualized Failure Rate (AFR)
Load unload cycles
Rated Workload
Warranty
Preventive maintenance
2.11
Agency certification
2.11.1 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.
2.11.2 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.
Seagate Enterprise NAS HDD Product Manual, Rev. A
14
1 per 10
bits read, max
0.73% (nominal power, 40°C case temperature)
300,000 cycles
Average rate of <300TB/year
The MTBF specification for the drive assumes the I/O workload does not exceed the Average Annu-
alized Workload Rate of <300TB/year. Workloads exceeding the annualized rate may degrade the
drive MTBF and impact product reliability. The Average Annualized Workload Rate is in units of TB
per year, or TB per 8760 power on hours. Workload Rate = TB transferred * (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 "Is my Drive under Warranty" link. The following are required to be pro-
vided: the drive serial number, model number (or part number) and country of purchase. The sys-
tem will display the warranty information for the drive.
None required.
Drive specifications
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