• If you must start the server while the server cover is removed, make sure that no one is near the server
and that no tools or other objects have been left inside the server.
• Do not attempt to lift an object that you think is too heavy for you. If you have to lift a heavy object,
observe the following precautions:
– Make sure that you can stand safely without slipping.
– Distribute the weight of the object equally between your feet.
– 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.
• Make sure that you have an adequate number of properly grounded electrical outlets for the server,
monitor, and other devices.
• Back up all important data before you make changes to disk drives.
• Have a small flat-blade screwdriver, a small Phillips screwdriver, and a T8 torx screwdriver available.
• To view the error LEDs on the system board and internal components, leave the server connected to
power.
• You do not have to turn off the server to install or replace hot-swap power 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.
• 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.
• 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.
• When you are finished working on the server, reinstall all safety shields, guards, labels, and ground wires.
• For a list of supported optional devices for the server, see http://www.lenovo.com/ serverproven/.
System reliability guidelines
The system reliability guidelines to ensure proper system cooling.
To help ensure proper system cooling and system reliability, make sure that the following requirements
are met:
• Each of the drive bays has a drive or a filler panel and electromagnetic compatibility (EMC) shield
installed in it.
• If the server has redundant power, each of the power-supply bays has a power supply installed in it.
• 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.
• You have followed the cabling instructions that come with optional adapters.
• You have replaced a failed fan within 48 hours.
• You have replaced a hot-swap drive within 2 minutes of removal.
• You do not operate the server without the air baffles installed. Operating the server without the air baffles
might cause the microprocessor to overheat.
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