How To Power Off The System; Before You Begin; What To Do - Sun Microsystems Sun Fire V490 Parts Installation And Removal Manual

How to Power Off the System

Before You Begin

Applications running on the Solaris Operating System (Solaris OS) can be adversely
affected by a poorly executed system shutdown. Make sure that you have gracefully
shut down any applications before powering off the system.

What to Do

1. Notify users that the system will be powered down.
2. Back up the system files and data, if necessary.
3. Ensure that the system control switch is in the Normal position.
4. Press and release the Power button on the system front panel.
The system begins a graceful software system shutdown.
Note – Pressing and releasing the Power button initiates a graceful software system
shutdown. Pressing and holding in the Power button for five seconds causes an
immediate hardware shutdown. Whenever possible, you should use the graceful
shutdown method. Forcing an immediate hardware shutdown may cause disk drive
corruption and loss of data. Use that method only as a last resort.
5. Wait for the system Power/OK LED to turn off.
6. Turn the system control switch to the Forced Off position.
Caution – Be sure to turn the system control switch to the Forced Off position
before handling any internal components. Otherwise, it is possible for an operator at
a system controller (SC) console to power on the system while you are working
inside it. The Forced Off position is the only system control switch position that
prevents an SC console from power on the system.
7. Remove the system key from the system control switch and keep it in a secure
place.
22 Sun Fire V490 Server Parts Installation and Removal Guide • October 2005