Sun Microsystems SPARC Enterprise T1000, Руководство администратора

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Chapter 2 Managing RAS Features and System Firmware 31
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 33 .
For more information about ASR, refer to the service manual for your server.
AutoBoot 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 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.
▼ To enable an Automatic Degraded Boot
●
Set the switches by typing:
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 32 .
ok setenv auto-boot? true
ok setenv auto-boot-on-error? true