IBM xSeries 305 Type 8673 Installation Manual page 28

2. See your operating system documentation for the proper procedure to shut
3. Press the power-control button on the front of the server.
4. Disconnect the server from the power source.
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xSeries 305 Type 8673: Installation Guide
down the operating system.
When you turn off the server, observe the following precaution.
Statement 5:
CAUTION:
The power control button on the device and the power switch on the
power supply do not turn off the electrical current supplied to the device.
The device also might have more than one power cord. To remove all
electrical current from the device, ensure that all power cords are
disconnected from the power source.