Reliability; Annualized Failure Rate (Afr) And Mean Time Between Failures (Mtbf); Agency Certification; Safety Certification - Seagate ST3750641NS Product Manual

2.12

Reliability

2.12.1

Annualized 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 in an environment that ensures the HDA case temperatures do not exceed 40
peratures outside the specifications in Section 2.9 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.
• 250 average motor start/stop cycles per year.
• Operations at nominal voltages.
• Systems will provide adequate cooling to ensure the case temperatures do not exceed 40
outside the specifications in Section 2.9 will increase the product AFR and decrease MTBF.
Nonrecoverable read errors
Annualized Failure Rate (AFR)
Contact start-stop cycles
Warranty
Preventive maintenance
2.13

Agency certification

2.13.1

Safety certification

The drives are recognized in accordance with UL 1950 and CSA C22.2 (950) and meet all applicable sections
of IEC950 and EN 60950 as tested by TUV North America.
2.13.2

Electromagnetic compatibility

Hard drives that display the CE mark comply with the European Union (EU) requirements specified in the Elec-
tromagnetic Compatibility Directive (89/336/EEC). 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.
Seagate uses an independent laboratory to confirm compliance with the EC directives specified in the previous
paragraph. 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.
Barracuda ES+ Serial ATA Product Manual, Rev. B
15
1 per 10 bits read, max
0.73% (nominal power, 40°C ambient temperature)
50,000 cycles
(at nominal voltage and temperature, with 60 cycles per hour and a 50% duty cycle)
5 years on distribution units.
To determine the warranty for a specific drive, use a web browser to access the
following web page: www.seagate.com/support/service/
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.
None required.
°
C. Operation at case tem-
°
C. Temperatures
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