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

▼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