Lenovo 6445, 6447, 6446 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.

Attention: In a dc power environment, only trained service personnel other than Lenovo service technicians are authorized to connect or disconnect power to the dc power supply and to install and remove a dc power supply. See the documentation that comes with each dc power supply.

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/ accessories.

System reliability guidelines

To help ensure proper 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 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.

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 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 socket 2 always contains either a heat-sink filler or a microprocessor and heat sink.

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.

8ThinkServer RD120 Types 6444, 6445, 6446, and 6447: Installation Guide