Power Down Server Gracefully Using the On/Standby Button
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Press and quickly release the On/Standby button on the front panel.
This action causes ACPI-enabled operating systems to perform an orderly shutdown of the operating system. Servers not running ACPI-enabled operating systems shut down to Standby power mode immediately.
When main power is off, the System OK LED on the front panel begins blinking, indicating that the server is in Standby power mode. See Server System-Level Status Indicators.
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Disconnect the power cords and data cables from the server.
See Disconnect Cables From the Server.
Caution - When you power down the server using the On/Standby button, the server enters Standby power mode. Power is still directed to the service processor and power supply fans. To completely power off the server, you must disconnect the power cords from the power supplies.