20
Sun SPARC Enterprise T1000 Server Administration Guide • April 2007
ALOM CMT
break
or
console
Command
Typing
break
from the
sc>
prompt forces a running server to drop into OpenBoot
firmware control. If the operating system is already halted, you can use the
console
command instead of
break
to reach the
ok
prompt.
Caution –
After forcing the system into OpenBoot firmware control, be aware that
issuing certain OpenBoot commands (like
probe-scsi
,
probe-scsi-all
, or
probe-ide
) might hang the system.
L1-A (Stop-A) Keys or Break Key
When it is impossible or impractical to shut down the system gracefully, you can get
to the
ok
prompt by typing the L1-A (Stop-A) key sequence from a keyboard
connected to the server (that is, if OpenBoot
input-device=keyboard
). If you
have an alphanumeric terminal attached to the server, press the Break key.
Caution –
After forcing the system into OpenBoot firmware control, be aware that
issuing certain OpenBoot commands (like
probe-scsi
,
probe-scsi-all
, or
probe-ide
) might hang the system.
Manual System Reset
Caution –
Forcing a manual system reset results in loss of system state data, and
should be attempted only as a last resort. After a manual system reset, all state
information is lost, which inhibits troubleshooting the cause of the problem until the
problem reoccurs.
Use the system controller
reset
command, or
poweron
and
poweroff
commands,
to reset the server. Reaching the
ok
prompt by performing a manual system reset or
by power-cycling the system should be the method of last resort. Using these
commands result in the loss of all system coherence and state information. A manual
system reset could corrupt the server’s file systems, although the
fsck
command
usually restores them. Use this method only when nothing else works.
Caution –
Accessing the
ok
prompt suspends the Solaris OS.
Summary of Contents for SPARC Enterprise T1000
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