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• Prevent your necktie, scarf, badge rope, or long hair from dangling into the server.
• Remove jewelry, such as bracelets, necklaces, rings, cuff links, and wrist watches.
• Remove items from your shirt pocket, such as pens and pencils, in case they 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
Review these guidelines before you handle static-sensitive devices to reduce the possibility of damage from
electrostatic discharge.
Attention: Prevent exposure to static electricity, which might lead to system halt and loss of data, by
keeping static-sensitive components in their static-protective packages until installation, and handling these
devices with an electrostatic-discharge wrist strap or other grounding system.
• Limit your movement to prevent building up static electricity around you.
• Take additional care when handling devices during cold weather, for heating would reduce indoor
humidity and increase static electricity.
• Always use an electrostatic-discharge wrist strap or other grounding system, particularly when working
inside the server with the power on.
• While the device is still in its static-protective package, touch it to an unpainted metal surface on the
outside of the server for at least two seconds. This drains static electricity from the package and from your
body.
• Remove the device from the package and install it directly into the server without putting it down. If it is
necessary to put the device down, put it back into the static-protective package. Never place the device
on the server or on any metal surface.
• When handling a device, carefully hold it by the edges or the frame.
• Do not touch solder joints, pins, or exposed circuitry.
• Keep the device from others' reach to prevent possible damages.
Returning a device or component
If you are instructed to return a device or component, follow all packaging instructions, and use any
packaging materials for shipping that are supplied to you.
Updating the compute node configuration
Use this information to update the compute node configuration.
When the compute node starts for the first time after you add or remove an internal device, you might receive
a message that the configuration has changed. See the Lenovo ThinkSystem SN550 Type 7X16 Setup Guide
for more information.
Some devices have device drivers that you must install. See the documentation that comes with each device
for information about installing device drivers.
The compute node operates as a symmetric multiprocessing (SMP) compute node, regardless of how many
processors are installed. For optimum performance, you must upgrade the operating system to support
SMP. See your operating-system documentation for additional information.
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Chapter 3
Hardware replacement procedures
23
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