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2.9
Reliability
2.9.1
Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
The production disk drive shall achieve an annualized failure-rate of 0.44% (MTBF of 2,000,000 hours) over a 5 year service
life when used in Storage field conditions as limited by the following:
• 8760 power-on hours per year.
• HDA temperature as reported by the drive <= 30°C
• Ambient wet bulb temp <= 26°C
• Typical workload
• 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. 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
Load unload cycles
Rated Workload
Warranty
Preventive maintenance
2.9.2
Storage
Maximum storage periods are 180 days within original unopened Seagate shipping package or 60 days unpackaged within the defined
non-operating limits (refer to environmental section in this manual). Storage can be extended to 1 year packaged or unpackaged under
optimal environmental conditions (25°C, <40% relative humidity non-condensing, and non-corrosive environment). During any storage
period the drive non-operational temperature, humidity, wet bulb, atmospheric conditions, shock, vibration, magnetic and electrical
field specifications should be followed.
Seagate SkyHawk AI Product Manual, Rev. B
15
1 per 10
bits read, max
300,000
Average annualized workload rating: <550TB/year.
The AFR specification for the product assumes the I/O workload does not exceed the average annu-
alized workload rate limit of 550TB/year. Workloads exceeding the annualized rate may degrade the
product AFR and impact reliability as experienced by the particular application. The average annual-
ized workload rate limit is in units of TB per calendar year.
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 system
will display the warranty information for the drive.
None required.
Drive Specifications
17
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