IBM 7945E2U User Manual - Page 54

System reliability guidelines, Working inside the server with the power on, Attention

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v To view the error LEDs on the system board and internal components, leave the server connected to power. v You do not have to turn off the server to install or replace hot-swap fans, redundant hot-swap ac power supplies, 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 or non-hot-swap optional devices or components. v Blue on a component indicates touch points, where you can grip the component to remove it from or install it in the server, open or close a latch, and so on. v Orange on a component or an orange label on or near a component indicates that the component can be hot-swapped, which means that if the server and operating system support hot-swap capability, you can remove or install the component while the server is running. (Orange can also indicate touch points on hot-swap components.) See the instructions for removing or installing a specific hot-swap component for any additional procedures that you might have to perform before you remove or install the component. v When you are finished working on the server, reinstall all safety shields, guards, labels, and ground wires. v For a list of supported optional devices for the server, see http://www.ibm.com/ servers/eserver/serverproven/compat/us/. 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 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. Operating the server for extended periods of time (more than 30 minutes) with the server cover removed might damage server components. 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 baffles installed. Operating the server without the air baffles might cause the microprocessors to overheat. v Microprocessor 2 air baffle and DIMM air baffle are installed. v The light path diagnostics panel is not pulled out of the server. 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. 38 System x3650 M3 Types 4255, 7945, and 7949: Installation and User's Guide

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v
To view the error LEDs on the system board and internal components, leave the
server connected to power.
v
You do not have to turn off the server to install or replace hot-swap fans,
redundant hot-swap ac power supplies, 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 or non-hot-swap optional devices or
components.
v
Blue on a component indicates touch points, where you can grip the component
to remove it from or install it in the server, open or close a latch, and so on.
v
Orange on a component or an orange label on or near a component indicates
that the component can be hot-swapped, which means that if the server and
operating system support hot-swap capability, you can remove or install the
component while the server is running. (Orange can also indicate touch points on
hot-swap components.) See the instructions for removing or installing a specific
hot-swap component for any additional procedures that you might have to
perform before you remove or install the component.
v
When you are finished working on the server, reinstall all safety shields, guards,
labels, and ground wires.
v
For a list of supported optional devices for the server, see http://www.ibm.com/
servers/eserver/serverproven/compat/us/.
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
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.
Operating the server for extended periods of time (more than 30 minutes) with
the server cover removed might damage server components.
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 baffles installed. Operating the
server without the air baffles might cause the microprocessors to overheat.
v
Microprocessor 2 air baffle and DIMM air baffle are installed.
v
The light path diagnostics panel is not pulled out of the server.
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.
38
System x3650 M3 Types 4255, 7945, and 7949: Installation and User’s Guide