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22 CONSTELLATION ES.3 SERIAL ATA PRODUCT MANUAL, REV. A
2.10 ELECTROMAGNETIC IMMUNITY
When properly installed in a representative host system, the drive operates without errors or degradation in performance when subjected
to the radio frequency (RF) environments defined in the following table:
2.11 RELIABILITY
2.11.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
The product shall achieve an Annualized Failure Rate (AFR) of 0.63% (MTBF of 1.4 million hours) when operated at nominal power and
typical case temperatures of 40°C. Operation at temperatures outside the specifications in Section 2.7 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 2.7 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.
Table 7 Radio frequency environments
TEST DESCRIPTION PERFORMANCE LEVEL REFERENCE STANDARD
Electrostatic discharge Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV B EN 61000-4-2: 95
Radiated RF immunity
80 to 1000 MHz, 3 V/m,
80% AM with 1 kHz sine
900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz
A
EN 61000-4-3: 96
ENV 50204: 95
Electrical fast transient ± 1 kV on AC mains, ± 0.5 kV on external I/O B EN 61000-4-4: 95
Surge immunity ± 1 kV differential, ± 2 kV common, AC mains B EN 61000-4-5: 95
Conducted RF immunity 150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz sine A EN 61000-4-6: 97
Voltage dips, interrupts
0% open, 5 seconds
0% short, 5 seconds
40%, 0.10 seconds
70%, 0.01 seconds
C
C
C
B
EN 61000-4-11: 94
Nonrecoverable read errors 1 per 10
15
bits read, max
Annualized Failure Rate (AFR) 0.63% (nominal power, 40°C case temperature)
Load unload cycles 600,000 cycles
Rated Workload Average rate of <550TB/year
The MTBF specification for the drive assumes the I/O workload does not exceed the
Average Annualized Workload Rate Limit of <550TB/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 Limit = TB transferred * ( 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-returns/
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.
Preventive maintenance None required.