System Reliability Guidelines; Working Inside The Server With The Power On - IBM System x3250 M3 Type 4251 Installation And User Manual

v Make sure that you have an adequate number of properly grounded electrical
v Back up all important data before you make changes to disk drives.
v Have a small flat-blade screwdriver, a small Phillips screwdriver, and a T8 torx
v You do not have to turn off the server to install or replace hot-swap power
v When you are finished working on the server, reinstall all safety shields, guards,
v For a list of supported optional devices for the server, see http://www.ibm.com/

System reliability guidelines

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
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 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

Working inside the server with the power on

Attention:
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
– Use a slow lifting force. Never move suddenly or twist when you lift a heavy
object.
– To avoid straining the muscles in your back, lift by standing or by pushing up
with your leg muscles.
outlets for the server, monitor, and other devices.
screwdriver available.
supplies, hot-swap fans, or hot-plug Universal Serial Bus (USB) devices.
However, you must turn off the server before you perform any steps that involve
removing or installing adapter cables and you must disconnect the power source
from the server before you perform any steps that involve removing or installing a
riser card.
labels, and ground wires.
servers/eserver/serverproven/compat/us/.
compatibility (EMC) 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 server cover before you turn on the server.
server without the air baffle might cause the microprocessor to overheat.
Static electricity that is released to internal server components when
before working inside the server; do not wear cuff links while you are working
inside the server.
Chapter 2. Installing optional devices
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