System reliability guidelinesThe system reliability guidelines to ensure proper system cooling.To help ensure proper system cooling and system reliability, make sure that thefollowing requirements are met:v Each of the drive bays has a drive or a filler panel and electromagneticcompatibility (EMC) shield installed in it.v If the server has redundant power, each of the power-supply bays has a powersupply installed in it.v There is adequate space around the server to allow the server cooling system towork properly. Leave approximately 50 mm (2.0 in.) of open space around thefront and rear of the server. Do not place objects in front of the fans. For propercooling and airflow, replace the server cover before you turn on the server.Operating the server for extended periods of time (more than 30 minutes) withthe server cover removed might damage server components.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 fan within 30 seconds of removal.v You have replaced a hot-swap drive within 2 minutes of removal.v You do not operate the server without the air baffles installed. Operating theserver without the air baffles might cause the microprocessors to overheat.v Microprocessor 2 air baffle and DIMM air baffle are installed.v The light path diagnostics panel is not pulled out of the server.Working inside the server with the power onGuidelines to work inside the server with the power on.Attention: Static electricity that is released to internal server components whenthe server is powered-on might cause the server to halt, which might result in theloss of data. To avoid this potential problem, always use an electrostatic-dischargewrist strap or other grounding system when you work inside the server with thepower on.The server supports hot-plug, hot-add, and hot-swap devices and is designed tooperate safely while it is turned on and the cover is removed. Follow theseguidelines when you work inside a server that is turned on:v Avoid wearing loose-fitting clothing on your forearms. Button long-sleevedshirts before working inside the server; do not wear cuff links while you areworking inside the server.v Do not allow your necktie or scarf to hang inside the server.v Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wristwatches.v Remove items from your shirt pocket, such as pens and pencils, that might fallinto the server as you lean over it.v Avoid dropping any metallic objects, such as paper clips, hairpins, and screws,into the server.Chapter 2. Installing optional devices 39
