System Reliability Considerations; Working Inside A Server With Power On; Handling Static-Sensitive Devices - IBM eServer 135 xSeries User Reference Manual

System reliability considerations

To help ensure proper cooling and system reliability, make sure that:
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Working inside a server with power on

Your server is designed to operate safely while turned on with the cover removed.
Follow these guidelines when you work inside a server that is turned on:
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Handling static-sensitive devices

Attention: Static electricity can damage electronic devices and your system. To
avoid damage, keep static-sensitive devices in their static-protective bag until you are
ready to install them.
To reduce the possibility of electrostatic discharge, observe the following precautions:
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IBM xSeries 135: User's Reference
Each of the drive bays has either a drive or a filler panel installed.
The cover is in place during operation or is removed for no longer than 30
minutes while the server is operating.
There is space around the server to enable the server cooling system to work
properly. Leave approximately 127 mm (5 in.) of space around the front and rear
of the server.
Cables for optional adapters are routed according to the instructions that are
provided with the adapters.
A failed fan is replaced within 48 hours.
Avoid 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, rings, necklaces, and loose-fitting wrist
watches.
Remove items from your shirt pocket (such as pens or pencils) that could fall
into the server as you lean over it.
Take care to avoid dropping any metallic objects, such as paper clips, hair pins,
or screws, into the server.
Limit your movement. Movement can cause static electricity to build up around
you.
Handle the device carefully, holding it by its edges or its frame.
Do not touch solder joints, pins, or exposed printed circuitry.
Do not leave the device where others can handle and possibly damage the
device.
While the device is still in its static-protective bag, touch it to an unpainted metal
part of the system unit for at least two seconds. (This drains static electricity
from the package and from your body).
Remove the device from its package and install it directly into your system unit
without setting it down. If it is necessary to set the device down, place it on its
static-protective bag. (If your device is an adapter, place it component side up).
Do not place the device on your system unit cover or on a metal table.
Take additional care when handling devices during cold weather because
heating reduces indoor humidity and increases static electricity.