IBM x3400 Installation Guide - Page 24
System, reliability, guidelines, Working, inside, server, power
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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 and 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 have to access the inside of the server, you might find it easier to lay the server on its side. v When you are finished working on the server, reinstall all safety shields, guards, labels, and ground wires. v For a list of supported options 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 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. Operating the server for extended periods of time (more than 30 minutes) with the server cover removed might damage server components. When installing the server in a rack, make sure that space is available around the server to enable the server cooling system to work properly. See the documentation that comes with the rack for additional information. v You have followed the cabling instructions that come with optional adapters. v You have replaced a failed fan within 48 hours. v You have replaced a hot-swap drive within 2 minutes of removal. v You do not operate the server without the DIMM air baffle installed. Operating the server without the air baffle might cause the DIMMs to overheat. Working inside the server with the power on Attention: Static electricity that is released to internal server components when the server is powered-on might cause the server to halt, which could result in the loss of data. To avoid this potential problem, always use an electrostatic-discharge wrist strap or other grounding system when working inside the server with the power on. The server (some models) supports hot-plug, hot-add, and hot-swap devices and is designed to operate safely while it is turned on and the cover is removed. Follow these guidelines when you work inside a server that is turned on. 10 System x3400 Types 7973, 7974, 7975, and 7976: Installation Guide