Sun Microsystems Sun Fire V480, Руководство администратора

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64 Sun Fire V480 Server Administration Guide • February 2002
Note –
ASR is not activated until you enable it. See “How to Enable ASR” on
page 163.
Auto-Boot Options
The OpenBoot firmware provides an IDPROM-stored setting 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, then
auto-boot?
is ignored and
the system does not boot unless an operator boots the system manually. This
behavior is obviously not acceptable for a degraded boot scenario. Therefore, the
Sun Fire V480 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
. Therefore, 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
non-recoverable error, even if degraded booting is enabled. For examples of fatal
non-recoverable errors, see “Error Handling Summary” on page 64.
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
.
ok setenv auto-boot? true
ok setenv auto-boot-on-error? true