System Reliability Guidelines; Working Inside The Server With The Power On; Handling Static-Sensitive Devices - Lenovo 5457 Installation And Service Manual

System reliability guidelines

The system reliability guidelines to ensure proper system cooling.
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 as soon as possible.
• You have replaced a hot-swap drive within 2 minutes of removal.
• You do not operate the server without the air baffle installed. Operating the server without the air baffle
might cause the microprocessor to overheat.

Working inside the server with the power on

Guidelines to work 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 might result in the loss of data. To avoid this potential problem, always
use an electrostatic-discharge wrist strap or other grounding system when you work 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 server cover is removed. Follow these guidelines when you work inside a server that is
turned on:
Note: In order to work inside the server with the power on, you have to disable the power cut-off switch
before removing the server cover.
• 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

Use this information to handle 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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Chapter 2 Installing optional devices
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