Seagate BARRACUDA ST1500DL003 - Manual (Page 20)

20 Barracuda Green SATA Product Manual, Rev. D
Drive Specifications www.seagate.com
2.10.1 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.
2.11 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:
2.12 Reliability
2.12.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
The product shall achieve an Annualized Failure Rate (AFR) of 0.34% (MTBF of 0.75 million hours) when operated
in an environment of ambient air temperatures of 25
° C. Operation at temperatures 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 desktop personal computer
environments:
• 2400 power-on-hours per year.
• 10,000 average motor start/stop cycles per year.
• Operations at nominal voltages.
• Temperatures outside the specifications in Section 2.9 may reduce the product reliability.
• Normal I/O duty cycle for desktop personal computers. Operation at excessive I/O duty cycle may degrade product
reliability.
Table 4 Radio frequency environments
Test Description
Performance
Level
Reference
standard
Electrostatic
discharge
Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV
B EN61000-4-2: 95
Radiated RF
immunity
80MHz to 1,000MHz, 3 V/m,
80% AM with 1kHz sine
900MHz, 3 V/m, 50% pulse modulation @
200Hz A EN61000-4-3: 96
ENV 50204: 95
Electrical fast
transient
± 1 kV on AC mains, ± 0.5 kV on external I/O
B EN61000-4-4: 95
Surge
immunity
± 1 kV differential, ± 2 kV common, AC mains
B EN61000-4-5: 95
Conducted RF
immunity 150kHz to 80MHz, 3 Vrms, 80% AM with 1kHz
sine A EN61000-4-6: 97
Voltage dips,
interrupts
0% open, 5 seconds
0% short, 5 seconds
40%, 0.10 seconds
70%, 0.01 seconds C
C
C
B EN61000-4-11: 94