Fujitsu SPARC Enterprise T2000, Administration Manual, Page: 46 / 98

24 SPARC Enterprise T2000 Server Administration Guide • April 2007
Caution – Accessing the
ok
prompt suspends the Solaris OS.
When you access the
ok
prompt from a functioning SPARC Enterprise T2000 server,
you are suspending the Solaris OS and placing the system under firmware control.
Any processes that were running under the operating system are also suspended,
and
the state of such processes might not be recoverable .
The commands you run from the
ok
prompt have the potential to affect the state of
the system. This means that it is not always possible to resume execution of the
operating system from the point at which it was suspended. Although the
go
command will resume execution in most circumstances, in general, each time you
drop the system down to the
ok
prompt, you should expect to have to reboot the
system to get back to the operating system.
For More Information
For more information about the OpenBoot firmware, refer to the OpenBoot 4.x
Command Reference Manual. An online version of the manual is included with the
OpenBoot Collection AnswerBook that ships with Solaris software.
Getting to the
ok
Prompt
This procedure provides several ways of reaching the
ok
prompt. The methods are
not equally desirable. For details about when to use each method, see “OpenBoot
ok
Prompt” on page 21 .
Caution – Obtaining the
ok
prompt suspends all application and operating system
software. After you issue firmware commands and run firmware-based tests from
the
ok
prompt, the system might not be able to resume where it left off.
If possible, back up system data before starting this procedure. Also exit or stop all
applications, and warn users of the impending loss of service. For information about
the appropriate backup and shutdown procedures, see Solaris system administration
documentation.