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Chapter 3
Maintaining the System
Preparing for System Component Installation or Replacement
This section describes how to prepare for component installation, and it includes the following topics:
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Required Equipment
The following equipment is used to perform the procedures in this chapter:
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Powering On the System
The system has two power states: standby power mode and main power mode.
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Shutting Down and Powering Off the System
You can invoke a graceful shutdown or a hard shutdown by using either the Cisco Integrated
Management Controller (Cisco IMC) interface or the system power button on the front panel.
To use the system power button, follow these steps:
Step 1
Check the color of the System Power Status LED (see the
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Step 2
Invoke either a graceful shutdown or a hard shutdown:
To avoid data loss or damage to your operating system, you should always invoke a graceful shutdown
Caution
of the operating system.
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OL-32062-01
Required Equipment, page 3-9
Shutting Down and Powering Off the System, page 3-9
Opening the Main Chassis Top Covers, page 3-10
Removing the Server Node Cover, page 3-12
Removing the System I/O Controller Cover, page 3-14
Number 2 Phillips-head screwdriver (for CPU heat sink screws)
Electrostatic discharge (ESD) strap or other grounding equipment such as a grounded mat
Standby power mode—When you plug power cords into the power supplies and connect to power,
the system powers on to standby power mode. The front panel power button/LED lights amber.
Power is supplied only to the server node service processor and the cooling fans.
Main power mode—To power the system to main power mode, press and hold the front panel power
button/LED and hold it for four seconds. The front panel power button/LED lights green. Power is
supplied to all system components and any operating system on your drives can run.
Green—The system is in main power mode and must be shut down before it can be safely powered
off. Go to
Step
2.
Amber—The system is already in standby mode and can be safely powered off. Go to
Graceful shutdown—Press and release the Power button. The operating system performs a graceful
shutdown and the system goes to standby mode, which is indicated by an amber Power Status LED.
Emergency shutdown—Press and hold the Power button for 4 seconds to force the main power off
and immediately enter standby mode.
Preparing for System Component Installation or Replacement
"Front-Panel LEDs" section on page
Cisco UCS C3160 Rack Server Installation and Service Guide
3-2).
Step
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3-9
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