IBM 79856au User Guide - Page 38
System, reliability, guidelines
UPC - 883436004374
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starts, if an operating system is installed, or that a 19990305 error code is displayed, indicating that an operating system was not found but the server is otherwise working correctly. If the server is not working correctly, see "Solving problems" in the Installation Guide for diagnostic information. v Observe good housekeeping in the area where you are working. Place removed covers and other parts in a safe place. v If you must start the server while the cover is removed, make sure that no one is near the server and that no tools or other objects have been left inside the server. v Do not attempt to lift an object that you think is too heavy for you. If you have to lift a heavy object, observe the following precautions: - Make sure that you can stand safely without slipping. - Distribute the weight of the object equally between your feet. - Use a slow lifting force. Never move suddenly or twist when you lift a heavy object. - To avoid straining the muscles in your back, lift by standing or by pushing up with your leg muscles. v Make sure that you have an adequate number of properly grounded electrical outlets for the server, monitor, and other devices. v Back up all important data before you make changes to disk drives. v Have a small flat-blade screwdriver available. v You do not have to turn off the server to install or replace hot-swap power supplies, hot-swap fans, or hot-plug Universal Serial Bus (USB) devices. However, you must turn off the server before performing any steps that involve removing or installing adapter cables. v Blue on a component indicates touch points, where you can grip the component to remove it from or install it in the server, open or close a latch, and so on. v Orange on a component or an orange label on or near a component indicates that the component can be hot-swapped, which means that if the server and operating system support hot-swap capability, you can remove or install the component while the server is running. (Orange can also indicate touch points on hot-swap components.) See the instructions for removing or installing a specific hot-swap component for any additional procedures that you might have to perform before you remove or install the component. v When you are finished working on the server, reinstall all safety shields, guards, labels, and ground wires. v For a list of supported optional devices for the server, see http://www.ibm.com/ servers/eserver/serverproven/compat/us/. System reliability guidelines To help ensure proper system cooling and system reliability, make sure that the following requirements are met: v Each of the drive bays has a drive or a filler panel and electromagnetic compatibility (EMC) shield installed in it. v If the server has redundant power, each of the power-supply bays has a power supply installed in it. v There is adequate space around the server to allow the server cooling system to work properly. Leave approximately 50 mm (2.0 in.) of open space around the front and rear of the server. Do not place objects in front of the fans. For proper cooling and airflow, replace the server cover before turning on the server. 24 System x3655 Type 7985: User's Guide