Sun Microsystems T6300 manual OpenBoot ok Prompt, Reaching the sc Prompt

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Reaching the sc> Prompt

There are several ways to obtain the sc> prompt:

■You can log in directly to the ALOM system controller from a device connected to the serial port. See “Accessing the System Controller” on page 3.

■You can log in directly to the ALOM system controller using a connection through the network management port. See “Activating the Network Management Port” on page 4.

■If you have logged in to the ALOM system controller and then directed the system console to the serial port and network management ports, you can return to the prior ALOM session by typing the ALOM system controller escape sequence (#.).

OpenBoot ok Prompt

The server with the Solaris OS installed is capable of operating at different run levels. A synopsis of run levels follows. For a full description of run levels, refer to the Solaris system administration documentation.

Most of the time, you operate the server at run level 2 or run level 3, which are multiuser states with access to full system and network resources. Occasionally, you might operate the system at run level 1, which is a single-user administrative state. However, the lowest operational state is run level 0. At this state, it is safe to turn off power to the system.

When your server is at run level 0, the ok prompt appears. This prompt indicates that the OpenBoot PROM firmware is in control of the system.

There are a number of scenarios under which OpenBoot firmware control can occur.

■By default, before the operating system is installed the system comes up under OpenBoot firmware control.

■When the auto-boot?OpenBoot configuration variable is set to false the system boots to the ok prompt.

■When the operating system is halted the system transitions to run level 0 in an orderly way.

■When the operating system crashes the system reverts to OpenBoot firmware control.

■During the boot process, when there is a serious hardware problem that prevents the operating system from running, the system reverts to OpenBoot firmware control.

12 Sun Blade T6300 Server Module Administration Guide • April 2007

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Contents Sun Blade T6300 Server Module Administration Guide Please Recycle Contents Managing RAS Features and System Firmware OpenBoot Configuration Variables Vi Sun Blade T6300 Server Module Administration Guide April Figures Page Tables Sun Blade T6300 Server Module Administration Guide April Preface How This Book Is OrganizedUsing Unix Commands Shell PromptsTypographic Conventions Related DocumentationSun Welcomes Your Comments Documentation, Support, and TrainingThird-Party Web Sites Configuring the System Console Communicating With the ServerWhat the Alom System Controller Console Does Using the System ConsoleWhat the System Console Does Accessing the System Controller Using the Serial PortActivating the Network Management Port Accessing the System Console Through a Terminal ServerTo Use the Serial Port Establish an Alom system controller sessionTo Access The System Console Through a Terminal Server Open a terminal session on the connecting device, and typeA shell tool window on the Sun system, type Accessing the System Console Through a TIP ConnectionTo Access the System Console Through a TIP Connection To Modify the /etc/remote File If the number displayed by the uname -rcommand is less thanModifying the /etc/remote File Sun Blade T6300 Server Module Administration Guide April Network management or Serial management port Alom sc Prompt Access Through Multiple Controller Sessions OpenBoot ok Prompt Reaching the sc PromptMethods to Reach the ok Prompt Graceful ShutdownL1-A Stop-A Keys or Break Key Alom System Controller break or console CommandManual System Reset For More Information About OpenBoot Firmware Obtaining the ok Prompt2Ways of Accessing the ok Prompt To Obtain the ok PromptSystem Console OpenBoot Configuration Variable Settings Sun Blade T6300 Server Module Administration Guide April Managing RAS Features and System Firmware Interpreting System LEDs 1LED Behavior and MeaningControlling the Locator LED TypeAutomatic System Recovery AutoBoot OptionsSet the switches by typing Error Handling SummaryTo Enable an Automatic Degraded Boot Reset Scenarios Automatic System Recovery User CommandsAt the sc prompt, type Enabling and Disabling Automatic System RecoveryTo Enable Automatic System Recovery At the ok prompt, typeTo Obtain ASR Information Obtaining Automatic System Recovery InformationTo Disable Automatic System Recovery To Reconfigure a Device Manually Unconfiguring and Reconfiguring DevicesTo Unconfigure a Device Manually Displaying System Fault Information To Display System Fault InformationMultipathing Software For More Information on Multipathing SoftwareAt the sc prompt type Storing FRU InformationTo Store Information in Available FRU PROMs OpenBoot Configuration Variables Variable-name Appendix a OpenBoot Configuration Variables Sun Blade T6300 Server Module Administration Guide April Symbols IndexProbe-ide, 14 probe-scsi, 14 probe-scsi-all, 14 showenv Setlocator sc command Sun Blade T6300 Server Module Administration Guide April