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v For a list of supported optional devices for the server, see http://www.ibm.com/
A single-power-supply server operating at 208 V ac
One power supply operating at 208 V ac supports a fully populated server, but it
does not support power or cooling redundancy.
System reliability guidelines
To help ensure proper cooling and system reliability, make sure that the following
requirements are met:
v Each of the drive bays has a drive or an electromagnetic compatibility (EMC)
v If the server has redundant power, each of the power-supply bays has a power
v There is adequate space around the server to allow the server cooling system to
v You have followed the cabling instructions that come with optional adapters.
v You have replaced a failed fan within 48 hours.
v You have replaced a hot-swap drive within 2 minutes of removal.
v For redundant and hot-swappable power supply operation, the power supplies
v Microprocessor sockets 1 - 4 each always contain either a heat-sink blank or a
Working 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-swap devices and is designed to operate safely while it is
turned on and the cover is removed. Follow these guidelines when you work inside
a server that is turned on:
v Avoid wearing loose-fitting clothing on your forearms. Button long-sleeved shirts
v Do not allow your necktie or scarf to hang inside the server.
v Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist
v Remove items from your shirt pocket, such as pens and pencils, that might fall
v Avoid dropping any metallic objects, such as paper clips, hairpins, and screws,
34
IBM System x3850 X5 and x3950 X5 Types 7145 and 7146: Installation and User's Guide
servers/eserver/serverproven/compat/us/.
shield installed in it.
supply installed in it.
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 top cover before you turn on the server.
Operating the server for extended periods of time (more than 30 minutes) with
the top cover removed might damage server components.
are connected to 200-240 V ac.
microprocessor and heat sink.
before you work inside the server; do not wear cuff links while you are working
inside the server.
watches.
into the server as you lean over it.
into the server.
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