DELL 201S User Manual

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Excessive shock can damage the function, external appearance, and physical struc-
ture of the storage system. Each Dell storage system has been designed to operate 
properly after withstanding a minimum of six consecutively executed shock pulses in 
the positive and negative x, y, and z axes.

Excessive vibration can cause the same problems as mentioned earlier for shock, as 
well as cause components to become loose in their sockets or connectors. Systems 
can be subject to significant vibration when being transported by vehicle or when 
operated in an environment with machinery that causes vibration.

For maximum shock and vibration values, see Appendix A, "Technical Specifications."

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Computer systems are especially sensitive to variations in voltage supplied by an 
electrical outlet. Overvoltage, undervoltage, and transients (or spikes) can erase data 
from memory or even cause components to fail. To protect against these types of 
problems, power cables should always be properly grounded and one or both of the 
following methods should be used:

Use an uninterruptible power supply (UPS) or one of the other power protection 
devices as described in "Power Protection Devices," found later in this chapter.

Place the storage system on a dedicated power circuit (rather than sharing a cir-
cuit with other heavy electrical equipment). In general, do not allow the storage 
system to share a circuit with any of the following:

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Copier machines

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Air conditioners

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Vacuum cleaners

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Space heaters

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Power tools

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Teletype machines

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Adding machines

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Laser printers

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Facsimile machines

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Any other motorized equipment

Besides these appliances, the greatest threat to a storage system's supply of power 
are surges or blackouts caused by electrical storms. Whenever possible, turn off the 
storage system and any peripherals and unplug them from their power sources during 
thunderstorms.