Product manual
Constellation ES.3 Serial ATA Product Manual, Rev. E 22
2.9 Test for Prominent Discrete Tones (PDTs)
Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this process is the use
of the absolute threshold of hearing. Seagate uses this threshold curve (originated in ISO 389-7) to discern tone audibility
and to compensate for the inaudible components of sound prior to computation of tone ratios according to Annex D of the
ECMA-74 standards.
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 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 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
• 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..
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
Load unload cycles 600,000 cycles
Maximum Rated Workload Maximum rate of <550TB/year
Workloads exceeding the annualized rate may degrade the drive MTBF and impact prod-
uct reliability. The 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).
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 on the “Check to see if the drive is under Warranty” link. The follow-
ing are required to be provided: 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.