FUJITSU T5140 - Manual (Page 62)

40 SPARC Enterprise T5140 and T5240 Servers Administration Guide • February 2008
Auto-Boot Options
The system firmware stores a configuration variable called auto-boot?, which
controls whether the firmware will automatically boot the operating system after
each reset. The default setting for SPARC Enterprise 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 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. To set the
switches, type:
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 40 .
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 firmware, the system attempts to
boot if auto-boot? is true.
■ If only nonfatal errors are detected by POST or OpenBoot firmware, the system
attempts to boot if auto-boot? is true and auto-boot-on-error? is true.
Nonfatal errors include the following:
■ SAS subsystem failure. In this case, a working alternate path to the boot disk is
required. For more information, see
“Multipathing Software” on page 47 .
■ Ethernet interface failure.
■
USB interface failure.
■
Serial interface failure.
■ PCI card failure.
ok setenv auto-boot? true
ok setenv auto-boot-on-error? true