System Reliability Guidelines; Working Inside The Server With The Power On - IBM System x3550 M3 Type 4254 Installation And User Manual

System reliability guidelines

To help ensure proper system cooling and system reliability, make sure that the
following requirements are met.
To help ensure proper system cooling and system reliability, make sure that the
following requirements are met:
v Each of the drive bays has a drive or a filler panel and electromagnetic
compatibility (EMC) shield installed in it.
v If the server has redundant power, each of the power-supply bays has a power
supply installed in it.
v There is adequate space around the server to allow the server cooling system to
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 server cover before you turn on the server.
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 fan within 30 seconds of removal.
v You have replaced a hot-swap drive within 2 minutes of removal.
v You do not operate the server without the air baffle installed. Operating the
server without the air baffle might cause the microprocessor to overheat.
v Microprocessor socket 2 always contains either a microprocessor baffle or a
microprocessor and heat sink.
v You have installed the sixth fan when you installed the second microprocessor
option.

Working inside the server with the power on

Use this information when 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-plug, hot-add, and hot-swap devices and is designed to
operate safely while it is turned on and the server 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 before working inside the server; do not wear cuff links while you are
working inside the server.
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
watches.
v Remove items from your shirt pocket, such as pens and pencils, that could fall
into the server as you lean over it.
v Avoid dropping any metallic objects, such as paper clips, hairpins, and screws,
into the server.
Chapter 2. Installing optional devices
45