System Reliability Considerations; Working Inside A Server With Power On; Handling Static-Sensitive Devices - IBM 8669 - Eserver xSeries 342 Hardware Maintenance Manual

System reliability considerations

To help ensure proper cooling and system reliability, make sure:
v Each of the drive bays has either a drive or a filler panel installed.
v Each of the power supply bays has either a power supply or a filler panel
v The cover is in place during normal operation.
v There is at least 50 mm (2 inches) of ventilated space at the sides of the server
v The cover is removed for no longer than 30 minutes while the server is
v The processor housing cover (if available on the server) that protects the
v A removed hot-swap drive is replaced within two minutes of removal.
v Cables for optional adapters are routed according to the instructions provided
v The fans are operating correctly and the air flow is good.
v A failed fan is replaced within 48 hours.
In addition, ensure that the environmental specifications for the system are met.
See "Features and specifications" on page 3.
For information on temperature error messages, see "Temperature error messages"
on page 99.

Working inside a server with power on

The server supports hot-plug, hot-add, and hot-swap devices and it 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:
v Avoid loose-fitting clothing on your forearms. Button long-sleeved shirts before
v Do not allow your necktie to hang inside the server.
v Remove jewelry, such as bracelets, necklaces, and loose-fitting wrist watches.
v Remove items from your shirt pocket (such as pens or pencils) that could fall into
v Take care to avoid dropping any metallic objects, such as paper clips, hair pins,

Handling static-sensitive devices

Static electricity, though harmless to you, can seriously damage server components
or options.
Note: When you are adding an internal option, do not open the static-protective
When you handle options and other server components, take these precautions to
avoid damage from static electricity:
v Limit your movement. Movement can cause static electricity to build up around
installed.
and 100 mm (4 inches) at the rear of the server.
operating.
processor and memory area is removed for no longer that ten minutes while the
server is operating.
with the adapters (ensure that cables are not restricting air flow).
working inside the server; do not wear cuff links while you are working inside the
server.
the server as you lean over it.
or screws, into the server.
package containing the option until you are instructed to do so.
you.
41
Installing options