IBM Netfinity 7100 User's Reference Manual page 14

Statement 5
CAUTION:
The power control button on the device and 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.
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IBM® Netfinity® 7100 User's Reference