System reliability guidelinesTo help ensure proper system cooling and system reliability, make sure that thefollowing requirements are met: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 in.) of open space around the frontand 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 as soon as possible.v You have replaced a hot-swap drive within 2 minutes of removal.Working inside the server with the power onAttention: 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-sleeved shirtsbefore working inside the server; do not wear cuff links while you are workinginside 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.22 System x3200 M2 Types 4367 and 4368: User’s Guide