This section contains information about power modes, server shutdowns, and server resets.
When the server enters full power mode, power is supplied to all the server components, the server boots, and the operating system (OS) functions. This is the normal operating condition for the server. The Power OK and SP OK indicators are steady on.
To enter full power mode, press the Power button on the server front panel when the server is in standby power mode. You can also enter full power mode by powering on the server from Oracle ILOM.
In standby power mode, low-level power is supplied only to the components required to run the SP. The OS does not boot.
To enter standby power mode, either:
Connect the AC power cables to the back of the server but do not press the Power button.
From full power mode, either press the front panel power button, or use Oracle ILOM.
When you connect power to the server, the SP boots. The SP OK indicator blinks while the SP is booting, then remains steady on once it has booted. The Power OK indicator flashes briefly every 3 seconds.
A graceful shutdown (also referred to as an orderly shutdown) closes files and prepares the file system before it shuts down the server to standby power mode. This is the safest method of shutting down the server.
To perform a graceful shutdown use the server OS, Oracle ILOM, or the server front panel Power button.
An immediate shutdown (also referred to as an emergency shutdown) shuts down the host immediately without closing files or preparing the file system. It should be used only in situations when you know that the chance of losing data is nonexistent or acceptable.
To completely remove power from the server, remove the power cords.
Shutting down the server from full power mode to standby power mode does not completely remove power from the server. When it is in standby power mode, the server is in a low-power state. This low-power state is enough to maintain the service processor (SP), which runs Oracle ILOM.
A warm reset is a reboot or restart of the server. It requires cycling the server power from full power mode to standby power mode and back to full power mode. For example, a warm reset might be required after a software or firmware update or when you want to launch Oracle System Assistant or the BIOS Setup Utility.
A cold reset of the server is a restart of the server from a completely powered-off state. A cold reset might be required to resolve a system issue. To perform a cold reset, place the server in standby power mode, disconnect the server from its power source by performing a complete power removal (see above), wait 30-60 seconds, and then connect the server to its power source.
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