Sun Microsystems T6300 manual Error Handling Summary, To Enable an Automatic Degraded Boot

Page 37

▼To Enable an Automatic Degraded Boot

●Set the switches by typing:

ok setenv auto-boot? true

ok setenv auto-boot-on-error? true

Note – The default setting for auto-boot-on-error?is false. The system will not attempt a degraded boot unless you change this setting to true. In addition, the system will not attempt a degraded boot in response to any fatal nonrecoverable error, even if degraded booting is enabled. For examples of fatal nonrecoverable errors, see “Error Handling Summary” on page 23.

Error Handling Summary

Error handling during the power-on sequence falls into one of the following three cases:

■If no errors are detected by POST or OpenBoot Diagnostics, the system attempts to boot if auto-boot?is true.

■If only nonfatal errors are detected by POST or OpenBoot Diagnostics, the system attempts to boot if auto-boot?is true and auto-boot-on-error?is true. Nonfatal errors include the following:

■Ethernet interface failure

■Serial interface failure

■PCI Express card failure

■Memory failure

When a DIMM fails, the firmware unconfigures the entire logical bank associated with the failed server module. Another nonfailing logical bank must be present in the system for the system to attempt a degraded boot. Note that certain DIMM failures might not be diagnosable to a single DIMM. These failures are fatal, and result in both logical banks being unconfigured.

Note – If POST or OpenBoot Diagnostics detect a nonfatal error associated with the normal boot device, the OpenBoot firmware automatically unconfigures the failed device and tries the next-in-line boot device, as specified by the boot-deviceconfiguration variable.

Chapter 2 Managing RAS Features and System Firmware 23

Image 37

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 ConventionsThird-Party Web Sites Documentation, Support, and TrainingSun Welcomes Your Comments Communicating With the Server Configuring the System ConsoleWhat the System Console Does Using the System ConsoleWhat the Alom System Controller 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 ServerTo Access the System Console Through a TIP Connection Accessing the System Console Through a TIP ConnectionA shell tool window on the Sun system, type Modifying the /etc/remote File If the number displayed by the uname -rcommand is less thanTo 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 Reaching the sc Prompt OpenBoot ok PromptGraceful Shutdown Methods to Reach the ok PromptManual System Reset Alom System Controller break or console CommandL1-A Stop-A Keys or Break Key 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 RecoveryTo Enable an Automatic Degraded Boot Error Handling SummarySet the switches by typing 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 Disable Automatic System Recovery Obtaining Automatic System Recovery InformationTo Obtain ASR Information To Unconfigure a Device Manually Unconfiguring and Reconfiguring DevicesTo Reconfigure a Device Manually To Display System Fault Information Displaying System Fault InformationFor More Information on Multipathing Software Multipathing SoftwareTo Store Information in Available FRU PROMs Storing FRU InformationAt the sc prompt type 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