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Oracle® Exadata Database Server X8-8 Service Manual

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Updated: June 2020
 
 

Power Control, Shutdown, and Reset States

This section contains information about power modes, server shutdowns, and server resets.

Procedure
Description
Main Power Mode
When the server enters Main 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 System OK and SP OK indicators are steady on.
To enter Main power mode, press the On/Standby button on the server front panel when the server is in Standby power mode. You can also enter Main power mode by powering on the server from Oracle ILOM.
Standby Power Mode
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 Main power mode, either press the front panel On/Standby 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 System OK indicator flashes briefly every 3 seconds.
Graceful Shutdown
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. Graceful Shutdown is the safest method of shutting down the server.
Power off the server gracefully to prevent data from being corrupted. Performing a graceful shutdown ensures that the system is ready for restart.
To perform a graceful shutdown use the server OS.
Immediate Shutdown
An immediate shutdown (also referred to as an emergency shutdown) shuts down the host immediately without closing files or preparing the file system. Immediate Shutdown should be used only in situations when you know that the chance of losing data is nonexistent or acceptable.
Complete Power Removal
To completely remove power from the server, remove the power cords.
Shutting down the server from Main power mode to Standby power mode does not completely remove power from the server. When the server is in Standby power mode, it is in a low-power state. The low-power state maintains the service processor (SP), which runs Oracle ILOM.
Warm Reset or Reboot
A warm reset is a reboot or restart of the server. It requires cycling the server power from Main power mode to Standby power mode and back to Main power mode. For example, a warm reset might be required after a software or firmware update or to access the BIOS Setup Utility.
Cold Reset
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.