Site Preparation

Environmental Elements

CAUTION Low humidity contributes to undesirably high levels of electrostatic charges. This increases the electrostatic discharge (ESD) voltage potential. ESD can cause component damage during servicing operations. Paper feed problems on high-speed printers are usually encountered in low-humidity environments.

Low humidity levels are often the result of the facility heating system and occur during the cold season. Most heating systems cause air to have a low humidity level, unless the system has a built-in humidifier.

Air Conditioning Ducts

Use separate computer room air conditioning duct work. If it is not separate from the rest of the building, it might be difficult to control cooling and air pressure levels. Duct work seals are important for maintaining a balanced air conditioning system and high static air pressure. Adequate cooling capacity means little if the direction and rate of air flow cannot be controlled because of poor duct sealing. Also, the ducts should not be exposed to warm air, or humidity levels may increase.

Dust and Pollution Control

Computer equipment can be adversely affected by dust and microscopic particles in the site environment.

Specifically, disk drives, tape drives, and some other mechanical devices can have bearing failures resulting from airborne abrasive particles. Dust may also blanket electronic components like printed circuit boards causing premature failure due to excess heat and/or humidity build up on the boards. Other failures to power supplies and other electronic components can be caused by metallically conductive particles. These metallic particles are conductive and can short circuit electronic components. Use every effort to ensure that the environment is as dust and particulant free as possible.

Smaller particles can pass though some filters and, over a period of time, resulting in possible cause problems in mechanical parts. Small dust particles can be prevented from entering the computer room by maintaining its air conditioning system at a high static air pressure level.

Other sources of dust, metallic, conductive, abrasive, and/or microscopic particles can be present. Some sources of these particulants are:

Subfloor shedding

Raised floor shedding

Ceiling tile shedding

These pollutants are not always visible to the naked eye. A good check to determine their possible presence is to check the underside of the tiles. The tile should be shiny, galvanized, and free from rust.

The computer room should be kept clean. The following guidelines are recommended:

Smoking—Establish a no-smoking policy. Cigarette smoke particles are eight times larger than the clearance between disk drive read/write heads and the disk surface.

Printer—Locate printers and paper products in a separate room to eliminate paper particulate problems.

Eating or drinking—Establish a no-eating or drinking policy. Spilled liquids can cause short circuits in equipment such as keyboards.

Tile floors—Use a dust-absorbent cloth mop rather than a dry mop to clean tile floors.

Appendix C

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HP RP7405/7410 manual Air Conditioning Ducts, Dust and Pollution Control

RP7405/7410 specifications

The HP RP7405 and RP7410 are high-performance servers in the HP Integrity line, specifically designed for mission-critical applications. These servers are built on the Itanium architecture and showcase HP's commitment to reliability, scalability, and performance. Targeted primarily at the enterprise market, both models are ideal for data-intensive workloads, virtualization, and large databases.

One of the standout features of the RP7405 and RP7410 is their robust architecture. The servers utilize HP's NonStop technology, ensuring high availability and fault tolerance. This architecture is designed to provide continuous uptime, which is crucial for businesses dependent on uninterrupted access to their data and applications. The RP7405 supports up to 4 processors, while the RP7410 can accommodate up to 8 processors, allowing for enhanced compute power and the ability to handle increasingly demanding workloads.

In terms of memory, the RP7405 and RP7410 support significant RAM configurations, making them capable of handling large memory-intensive applications. They are equipped with advanced memory management technology, including ECC (Error-Correcting Code) memory, which helps to detect and correct data corruption, thereby enhancing system reliability.

The servers employ HP's Virtual Partition (vPars) technology, which allows for efficient server consolidation by enabling multiple virtual servers to operate on a single physical machine. This capability enhances resource utilization and simplifies management, thus reducing IT costs while maximizing performance.

HP's Serviceguard clustering software is integrated into both servers, offering enhanced availability through active-active clustering and failover capabilities. This software ensures that workloads can be seamlessly transitioned between servers in the event of hardware failures or maintenance, further minimizing downtime.

Security is also a paramount consideration with the HP RP7405 and RP7410. The servers come equipped with advanced security features, including secure boot, encryption, and an array of compliance certifications, ensuring that sensitive data is protected against unauthorized access.

Additionally, the servers support a wide range of operating systems, including HP-UX, which is optimized for the Itanium architecture. This flexibility allows organizations to choose the operating environment that best suits their application needs.

In conclusion, the HP RP7405 and RP7410 are powerful servers designed for high-performance applications in enterprise environments. With their advanced architecture, extensive memory support, virtualization capabilities, and robust security features, these servers stand out as reliable solutions for organizations seeking to enhance their IT infrastructure while ensuring high availability and performance.