Operating Drive Dc Magnetic Field Susceptibility; Acoustics; Rohs (Restriction Of Hazardous Substances); Reliability Characteristics - Western Digital Blue WD20SPZX Technical Reference Manual

2.5.8

Operating Drive DC Magnetic Field Susceptibility

Drive level operational magnetic DC field susceptibility:
160 Gauss outside shaded area

40 Gauss inside shaded area in all magnetic field directions

Figure 2-4. Operating Drive DC magnetic Field Susceptibility
2.5.9

Acoustics

TYPICAL SOUND POWER LEVEL
Idle Mode (average dBA)
Seek Mode (average dBA)
1
Measured per ECMA-74/ISO 7779.
2
No audible pure tones.
3
Random seek at a rate of 26 seeks per second.
2.5.10

RoHS (Restriction of Hazardous Substances)

WD hard drive products manufactured and sold worldwide after June 8, 2011, meet or
exceed Restriction of Hazardous Substances (RoHS) compliance requirements as
mandated by the RoHS Directive 2011/65/EU. RoHS aims to protect human health
and the environment by restricting the use of certain hazardous substances in new
equipment, and consists of restrictions on lead, mercury, cadmium, and other
substances.
2.6

Reliability Characteristics

The average Annualized Failure Rate (AFR) calculations assume the reliability
characteristics below. When the system in which the drive is installed is not capable
of meeting the characteristics listed below, please use a WD drive that matches your
Specifications
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