Chapter 5 Maintaining the Cisco Global Site Selector 4490
Maintaining Your Site Environment
Magnetism
Because they store data magnetically, hard disk drives are extremely susceptible to the effects of magnetism. Hard disk drives should never be stored near magnetic sources such as the following:
•Monitors
•TV sets
•Printers
•Telephones with real bells
•Fluorescent lights
Power Source Interruptions
Systems are especially sensitive to variations in voltage supplied by the AC power source. 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 one of the power protection devices described in the “Using Power Protection Devices” section.
•Place the system on a dedicated power circuit (rather than sharing a circuit with other heavy electrical equipment). In general, do not allow the system to share a circuit with any of the following:
–Copier machines
–Air conditioners
–Vacuum cleaners
–Space heaters
–Power tools
–Teletype machines
| Cisco Global Site Selector 4490 Hardware Installation Guide |
