Руководство по эксплуатации Cisco Systems Cisco Wave 594 Application Acceleration Appliance WAVE594K9

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APPENDIX
B
Maintaining the WAVE-594 and WAVE-694
Proper use of preventive maintenance procedures can keep the WAVE-594 and WAVE-694 in good
operating condition and minimize the need for costly, time-consuming service procedures. This chapter
contains maintenance procedures that you should perform regularly.
This chapter covers the tasks required for maintaining a WAVE-594 and WAVE-694 or a WAVE-594 and
WAVE-694 farm:
• Maintaining Your Site Environment, page B-1
� Using Power Protection Dev

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Appendix B Maintaining the WAVE-594 and WAVE-694 Maintaining Your Site Environment Temperature Temperature extremes can cause a variety of problems, including premature aging and failure of chips or mechanical failure of appliances. Extreme temperature fluctuations can cause chips to become loose in their sockets and can cause expansion and contraction of disk drive platters, resulting in read or write data errors. To minimize the negative effects of the temperature on system perfor

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Appendix B Maintaining the WAVE-594 and WAVE-694 Maintaining Your Site Environment Each system is designed to operate at a maximum altitude of 3000 meters (9,843 feet) with some de-rating of maximum operating temperature (see Appendix A, “WAVE-594 and WAVE-694 Hardware Specifications”) and can be stored at a maximum altitude of 4572 meters (15,000 feet). Dust and Particles A clean operating environment can greatly reduce the negative effects of dust and other particles, which act as

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Appendix B Maintaining the WAVE-594 and WAVE-694 Maintaining Your Site Environment Electromagnetic and Radio Frequency Interference Electromagnetic interference (EMI) and radio frequency interference (RFI) from a system can adversely affect devices such as radio and television (TV) receivers operating near the system. Radio frequencies emanating from a system can also interfere with cordless and low-power telephones. Conversely, RFI from high-power telephones can cause spurious char

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Appendix B Maintaining the WAVE-594 and WAVE-694 Using Power Protection Devices 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 pro

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Appendix B Maintaining the WAVE-594 and WAVE-694 Using Power Protection Devices Surge Protectors Surge protectors are available in a variety of types and usually provide a level of protection commensurate with the cost of the device. Surge protectors prevent voltage spikes, such as those caused during an electrical storm, from entering a system through the electrical outlet. Surge protectors, however, do not offer protection against brownouts, which occur when the voltage drops more