Some operating systems require an orderly shutdown before you turn off the server. See your
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.
2 1
The server can be turned off in any of the following ways:
vYou can turn off the server from the operating system, if your operating system supports this feature. After an orderly shutdown of the operating system, the server will be turned off automatically.
vYou can press the
vIf the operating system stops functioning, you can press and hold the
vThe IMM can turn off the server as an automatic response to a critical system failure.
vYou can turn off the server through a request from the IMM.
32ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Installation and User Guide