SGI Origin 3900 Specifications download pdf (Page 25)

Environmental Requirements

007-4603-001 11

Cooling In Mission-critical Installations

In mission-critical installations, it is important to consider what would happen if an air

conditioner failed. Complete consideration of this topic is beyond the scope of this guide;

however, consider the following questions:

• Should the site have multiple air-conditioning units, each capable of maintaining a

safe temperature?

• If an air conditioner fails, how long can the systems run before they get too warm

and must be shut off?

• Can the air conditioner be repaired before the systems get too warm?

Environmental Requirements

Electromagnetic interference (EMI), electrostatic discharge (ESD), vibration, and

humidity can cause problems for computer systems.

Electromagnetic Interference

Electromagnetic interference (EMI) is caused by malfunctioning, incorrectly

manufactured, or incorrectly installed devices that radiate electrical signals. Common

sources of EMI include electronic, telephone, and communications equipment. EMI

transmissions can be conducted or emitted.

Use properly shielded connectors and cables throughout the site.

Caution: Failure to use shielded cables where appropriate may violate FCC regulations

and void the manufacturer’s warranty.

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SGI Origin 3900 Specifications Page 25