System Reliability Guidelines; Working Inside The Server With The Power On; Handling Static-Sensitive Devices - Lenovo ThinkServer RD220 Hardware Maintenance Manual

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.
• When you are finished working on the server, reinstall all safety shields, guards, labels, and ground wires.
• For 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:
• Each of the drive bays has a drive or a filler panel and electromagnetic compatibility (EMC) shield
installed in it.
• If the server has redundant power, each of the power-supply bays has a power supply installed in it.
• 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 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.
• You have followed the cabling instructions that come with optional adapters.
• You have replaced a failed fan within 48 hours.
• You have replaced a hot-swap fan within 30 seconds of removal.
• You have replaced a hot-swap drive within 2 minutes of removal.
• You do not operate the server without the air baffles installed. Operating the server without the air baffles
might cause the microprocessors to overheat.
• Microprocessor 2 air baffle and DIMM air baffle are installed.
• The 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:
• Avoid wearing loose-fitting clothing on your forearms. Button long-sleeved shirts before working inside
the server; do not wear cuff links while you are working inside the server.
• Do not allow your necktie or scarf to hang inside the server.
• Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist watches.
• Remove items from your shirt pocket, such as pens and pencils, that could fall into the server as you
lean over it.
• Avoid dropping any metallic objects, such as paper clips, hairpins, and screws, into the server.

Handling static-sensitive devices

Attention: Static electricity can damage the server and other electronic devices. To avoid damage, keep
static-sensitive devices in their static-protective packages until you are ready to install them.
To reduce the possibility of damage from electrostatic discharge, observe the following precautions:
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ThinkServer RD220 Hardware Maintenance Manual