Sun Microsystems T6300 For More Information About OpenBoot Firmware, Obtaining the ok Prompt

Page 29

Using these commands results in the loss of all system coherence and state information. A manual system reset could corrupt the server’s file systems, although the fsck command usually restores them. Use this method only when nothing else works.

Caution – Accessing the ok prompt suspends the Solaris OS.

When you access the ok prompt from a functioning server, you are suspending the Solaris OS and placing the system under firmware control. Any processes that were running under the operating system are also suspended, and the state of such processes might not be recoverable.

After a manual system reset the system can be configured to boot automatically if the OpenBoot auto-boot?configuration variable is set to true. See “System Console OpenBoot Configuration Variable Settings” on page 17. If the server begins to boot automatically after a reset, you must abort the boot with the ALOM system controller break command or perform a graceful shutdown of the Solaris Operating System after the boot has completed.

The commands you run from the ok prompt have the potential to affect the state of the system. This means that it is not always possible to resume execution of the operating system from the point at which it was suspended. Although the go command will resume execution in most circumstances, in general, each time you obtain the ok prompt, you should expect to have to reboot the system to get back to the operating system.

For More Information About OpenBoot Firmware

For more information about the OpenBoot firmware, refer to the OpenBoot 4.x Command Reference Manual. You can obtain an online version of the manual at

http://www.sun.com/documentation/

Obtaining the ok Prompt

This procedure provides several ways of reaching the ok prompt. For details about when to use each method, see “OpenBoot ok Prompt” on page 12.

Chapter 1 Configuring the System Console 15

Image 29

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 How This Book Is Organized PrefaceShell Prompts Using Unix CommandsRelated Documentation Typographic ConventionsSun Welcomes Your Comments Documentation, Support, and TrainingThird-Party Web Sites Communicating With the Server Configuring the System ConsoleWhat the Alom System Controller Console Does Using the System ConsoleWhat the System Console Does Using the Serial Port Accessing the System ControllerTo Use the Serial Port Accessing the System Console Through a Terminal ServerActivating the Network Management Port Establish an Alom system controller sessionOpen a terminal session on the connecting device, and type To Access The System Console Through a Terminal ServerA 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 Reaching the sc Prompt OpenBoot ok PromptGraceful Shutdown Methods to Reach the ok PromptL1-A Stop-A Keys or Break Key Alom System Controller break or console CommandManual System Reset Obtaining the ok Prompt For More Information About OpenBoot FirmwareTo Obtain the ok Prompt 2Ways of Accessing the ok PromptSystem Console OpenBoot Configuration Variable Settings Sun Blade T6300 Server Module Administration Guide April Managing RAS Features and System Firmware 1LED Behavior and Meaning Interpreting System LEDsType Controlling the Locator LEDAutoBoot Options Automatic System RecoverySet the switches by typing Error Handling SummaryTo Enable an Automatic Degraded Boot Automatic System Recovery User Commands Reset ScenariosTo Enable Automatic System Recovery Enabling and Disabling Automatic System RecoveryAt the sc prompt, type 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 To Display System Fault Information Displaying System Fault InformationFor More Information on Multipathing Software 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 Index SymbolsProbe-ide, 14 probe-scsi, 14 probe-scsi-all, 14 showenv Setlocator sc command Sun Blade T6300 Server Module Administration Guide April