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Power disruptions take many forms, including power surges and sags, high-voltage

spikes, switching transients, brownouts, and complete power failure. When a power

disruption occurs, check the server for signs of data damage, data loss, file

corruption, and hardware damage. The difficulty of dealing with power fluctuations

is that the damage is not always immediately noticeable; thus, problems may not be

noticed until long after the power disruption has occurred. Power management

hardware like an uninterruptible power supply (UPS) minimizes the effect of power

fluctuations and disruptions and is highly recommended.

Preventing Power Management Problems

When determining the power requirements for the server, consider the factors in this

section.

Be sure that you are following the power requirements described in the server

documentation. Also, the installation of the system equipment must be in accordance

with local/regional electrical regulations governing the installation of information

technology equipment by licensed electricians.

For electrical power ratings on options, refer to the rating label on the product or user

documentation supplied with that option.

Before configuring the server, you must evaluate power consumption requirements

and determine the appropriate number of power supplies to be sure that the server has

sufficient power capacity. In addition to determining the minimum power supply

requirements, you must also consider whether AC power redundancy is a

requirement, if applicable to the server. For more information on the specific power

capabilities of the server, refer to the server documentation. To obtain the most

accurate power capacity and assessment of power margin, use the power calculator

provided on the ActiveAnswers website at

http://activeanswers.compaq.com/aaconfigurator

Error Prevention Guide