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3-8
Cisco UCS C210 Server Installation and Service Guide
OL-20887-02
Chapter
Shutting Down and Powering Off the Server
Tip If you have ordered a server with power supply redundancy (at least two power supplies), you do not
have to power off the server to replace a power supply because they are redundant and hot-pluggable.
The server hard drives are also hot-pluggable.
The server can run in two power modes:
• Main power mode—Power is supplied to all server components and any operating system on your
hard drives can run.
• Standby power mode—Power is supplied only to the service processor and the cooling fans and it
is safe to power off the server from this mode.
You can invoke a graceful shutdown or an emergency shutdown (hard shutdown) by using either of the
following methods:
• Use the CIMC management interface. See either the Cisco UCS C-Series Rack-Mount Server
Configuration Guide or the Cisco UCS C-Series Rack-Mount Server CLI Configuration Guide.
• Use the Power button on the server front panel. To use the Power button, follow these steps:
Step 1 Check the color of the Power Status LED (see the “Front Panel LEDs” section on page 3-2).
• Green indicates that the server is in main power mode and must be shut down before it can be safely
powered off. Go to
Step 2.
• Amber indicates that the server is already in standby mode and can be safely powered off. Go to
Step 3.
Step 2 Invoke either a graceful shutdown or a hard shutdown:
Caution To avoid data loss or damage to your operating system, you should always invoke a graceful shutdown
of the operating system.
• Graceful shutdown—Press and release the Power button. The operating system will perform a
graceful shutdown and the server 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.
Step 3 Disconnect the power cords from the power supplies in your server to completely power off the server.