Sun Microsystems T6300 manual Automatic System Recovery, AutoBoot Options

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▼To Display the State of the Locator LED From the ALOM System Controller Command Prompt

●Type:

sc> showlocator

Locator LED is on.

Note – You do not need user permissions to use the setlocator and showlocator commands.

Automatic System Recovery

Automatic System Recovery functionality enables the system to resume operation after experiencing certain nonfatal hardware faults or failures. When ASR is enabled, the system’s firmware diagnostics automatically detect failed hardware components. An autoconfiguring capability designed into the system firmware enables the system to unconfigure failed components and to restore system operation. As long as the system is capable of operating without the failed component, the ASR features enable the system to reboot automatically, without operator intervention.

Note – ASR is not activated until you enable it. See “Enabling and Disabling Automatic System Recovery” on page 25.

AutoBoot Options

The system firmware stores a configuration variable called auto-boot?, which controls whether the firmware automatically boots the operating system after each reset. The default setting for Sun platforms is true.

Normally, if a system fails power-on diagnostics, auto-boot?is ignored and the system does not boot unless an operator boots the system manually. An automatic boot is generally not acceptable for booting a system in a degraded state. Therefore, the server’s OpenBoot firmware provides a second setting, auto-boot-on-error?. This setting controls whether the system will attempt a degraded boot when a subsystem failure is detected. Both the auto-boot?and auto-boot-on-error?switches must be set to true to enable an automatic degraded boot.

22 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 DocumentationDocumentation, Support, and Training Third-Party Web SitesSun Welcomes Your Comments Configuring the System Console Communicating With the ServerUsing the System Console What the System Console DoesWhat the Alom System Controller Console Does Accessing the System Controller Using the Serial PortAccessing the System Console Through a Terminal Server To Use the Serial PortActivating the Network Management Port Establish an Alom system controller sessionTo Access The System Console Through a Terminal Server Open a terminal session on the connecting device, and typeAccessing the System Console Through a TIP Connection To Access the System Console Through a TIP ConnectionA shell tool window on the Sun system, type If the number displayed by the uname -rcommand is less than Modifying the /etc/remote FileTo Modify 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 ShutdownAlom System Controller break or console Command Manual System ResetL1-A Stop-A Keys or Break Key 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 OptionsError Handling Summary To Enable an Automatic Degraded BootSet the switches by typing Reset Scenarios Automatic System Recovery User CommandsEnabling and Disabling Automatic System Recovery To Enable Automatic System RecoveryAt the sc prompt, type At the ok prompt, typeObtaining Automatic System Recovery Information To Disable Automatic System RecoveryTo Obtain ASR Information Unconfiguring and Reconfiguring Devices To Unconfigure a Device ManuallyTo Reconfigure a Device Manually Displaying System Fault Information To Display System Fault InformationMultipathing Software For More Information on Multipathing SoftwareStoring FRU Information To Store Information in Available FRU PROMsAt the sc prompt type 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