When you access the ok prompt from a functioning 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.
After a manual system reset the system can be configured to boot automatically if the OpenBoot
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 about OpenBoot Firmware
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. For details about when to use each method, see “OpenBoot ok Prompt” on page 18.
Caution – Forcing the server to 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 at all 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.
Chapter 1 Configuring the System Console 21