Ultrastar 7K2
HGST Hard Disk Drive
Technical Reference Manual
18
Cooling
If forced air cooling is required, the recommended airflow from one or more fans as indicated in Figure 3.
Figure 3 Forced Airflow Direction
Atmospheric Pressure
Acoustics
TYPICAL SOUND POWER LEVEL
1
Idle Mode (average dBA)
2
25
Seek Mode (average dBA) 28
1
Measured per ECMA-74/ISO 7779.
2
No audible pure tones.
RoHS (Restriction of Hazardous Substances)
HGST 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.
Altitude
Operating
Non-
-1,000 feet to 10,000 feet (-305M to 3,050M)
-1,000 feet to 40,000 feet (-305M to 12,200M)
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