IBM 8669 Hardware Maintenance Manual - Page 51

System reliability considerations, Working inside a server with power

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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 installed. 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 and 100 mm (4 inches) at the rear of the server. v The cover is removed for no longer than 30 minutes while the server is operating. v The processor housing cover (if available on the server) that protects the processor and memory area is removed for no longer that ten minutes while the server is operating. 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 with the adapters (ensure that cables are not restricting air flow). 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 working inside the server; do not wear cuff links while you are working inside the server. 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 the server as you lean over it. v Take care to avoid dropping any metallic objects, such as paper clips, hair pins, or screws, into the server. 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 package containing the option until you are instructed to do so. 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 you. Installing options 41

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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
installed.
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
and 100 mm (4 inches) at the rear of the server.
v
The cover is removed for no longer than 30 minutes while the server is
operating.
v
The processor housing cover (if available on the server) that protects the
processor and memory area is removed for no longer that ten minutes while the
server is operating.
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
with the adapters (ensure that cables are not restricting air flow).
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
working inside the server; do not wear cuff links while you are working inside the
server.
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
the server as you lean over it.
v
Take care to avoid dropping any metallic objects, such as paper clips, hair pins,
or screws, into the server.
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
package containing the option until you are instructed to do so.
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
you.
Installing options
41