Lenovo 3797 manual System reliability guidelines, Working inside the server with the power on

vYou do not have to turn off the server to install or replace hot-swap fans, redundant hot-swap ac power supplies, 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 or non-hot-swap optional devices or components.

vBlue 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.

vOrange 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.

vWhen you are finished working on the server, reinstall all safety shields, guards, labels, and ground wires.

vFor a list of supported optional devices for the server, see http://www.lenovo.com/ thinkserver.

System reliability guidelines

To help ensure proper system cooling and system reliability, make sure that the following requirements are met:

vEach of the drive bays has a drive or a filler panel and electromagnetic compatibility (EMC) shield installed in it.

vIf the server has redundant power, each of the power-supply bays has a power supply installed in it.

vThere 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 you turn on the server. Operating the server for extended periods of time (more than 30 minutes) with the server cover removed might damage server components.

vYou have followed the cabling instructions that come with optional adapters.

vYou have replaced a failed fan within 48 hours.

vYou have replaced a hot-swap fan within 30 seconds of removal.

vYou have replaced a hot-swap drive within 2 minutes of removal.

vYou do not operate the server without the air baffles installed. Operating the server without the air baffles might cause the microprocessors to overheat.

vMicroprocessor 2 air baffle and DIMM air baffle are installed.

vThe EasyLED diagnostics panel is not pulled out of the server.

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 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:

34ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Installation and User Guide